# Problems On Empirical Probability Free Doubts and Solutions

### CBSE - IX - Mathematics - Probability

## Three dice are thrown simultaneously. The probability of getting a total of atleast 5 of the numbers appearing on their tops is?

**adityaahuja099**12th December 2017, 5:33 PM

### CBSE - IX - Mathematics - Probability

**WHAT IS THE PROBABILITY THAT AN ORDINARY YEAR HAS 53 MONDAY ?**

**WHAT IS THE PROBABILITY THAT AN ORDINARY YEAR HAS 53 MONDAY ?**

**Madan Gupta**29th March 2017, 6:58 AM

### CBSE - IX - Mathematics - Probability

**qus 1** - Show how if two coins are tossed simultaneously. the probablity of getting atmost one head is 3/4.
**qus 2 **- A bag contains 50 coins and each coin is marked from 51 to 100. one coin is picked at random. find the probability that the number on the coin is a prime number.

**qus 1**- Show how if two coins are tossed simultaneously. the probablity of getting atmost one head is 3/4.

**qus 2**- A bag contains 50 coins and each coin is marked from 51 to 100. one coin is picked at random. find the probability that the number on the coin is a prime number.

**Varsha**25th January 2015, 6:09 PM

### CBSE - IX - Mathematics - Probability

## when udar purchased an item online froma australia for AUD 350.00,the exchange rate wasc 1000 INR for aud 17.50. udars bank charged him 1.5% for the transaction.

**thomassubin32**1st September 2014, 9:11 PM

### CBSE - IX - Mathematics - Probability

## Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes: Outcome 3 Heads 2 Heads 1 Head No Head Frequency 23 72 77 28 From the above data, find the probability of getting (i) 2 heads, (ii) 2 tails, (iii) 3 tails.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Probability

## A coin is tossed simultaneously for a number of times. The ratio of number of heads obtained to the number of tails obtained is 4: 5. What is the probability of getting a head in the next throw?

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Probability

## In the past 50 cricket matches between two teams A and B, team A had won 29 matches. What is the experimental probability that in the next cricket match between the two teams, team A will lose?

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Probability

## Sita says that in word MADAM, the probability of letter M is equal to that of letter A. Is she right? What value it represents?

**Topperlearning User**13th December 2013, 3:06 AM

### CBSE - IX - Mathematics - Probability

## A die is rolled 70 times such that an even number occurred 46 times and an even number less than 5 occurred 24 times. What is the probability of getting the number 6 on the die?

**Topperlearning User**13th December 2013, 2:19 AM

### CBSE - IX - Mathematics - Probability

## A bag contains 12 balls out of which x are white. If one ball is taken out from the bag, find the probability of getting a white ball. If 6 more white balls are added to the bag and the probability now for getting a white ball is double the previous one, find the value of x.

**Topperlearning User**12th December 2013, 10:11 AM

### CBSE - IX - Mathematics - Probability

## In making a math project, a teacher found out that 26 people took two to three hours, 14 people took three to four hours and 10 people took more than four hours to complete a particular assignment. What is the experimental probability that the assignment can be done in less than four hours?

**Topperlearning User**12th December 2013, 9:37 AM

### CBSE - IX - Mathematics - Probability

## Twenty four people had a blood test and the results are shown below. A, B, B, AB, AB, B, O, O, AB, O, B, A AB, A, O, O, AB, B, O, A, AB, O, B, A (a) Construct a frequency distribution for the data. (b) If a person is selected randomly from the group of twenty four people, what is the probability that his/her blood type is not O? (c) What value do you draw from this activity?

**Topperlearning User**12th December 2013, 9:35 AM

### CBSE - IX - Mathematics - Probability

## A survey found that ages of 250 workers in a factory is distributed as follows: Ages (in years) 20 - 29 30 - 39 40 - 49 50 - 59 60 and above Number of workers 50 35 95 55 15 If a person is selected at random, find probability that the person is: (i) 40 years or more (ii) having age from 30 to 39 years (iii) under 60 years but over 39 years.

**Topperlearning User**11th December 2013, 3:48 AM

### CBSE - IX - Mathematics - Probability

## Two dice are thrown 400 times. Each time sum of two numbers appearing on their tops is noted as given in the following table: Sum 2 3 4 5 6 7 8 9 10 11 12 Frequency 14 20 32 45 62 65 60 43 36 18 5 What is the probability of getting a sum (i) 5 ? (ii) more than 10 ? (iii) between 5 and 10?

**Topperlearning User**11th December 2013, 3:43 AM

### CBSE - IX - Mathematics - Probability

## Two dice are thrown simultaneously 500 times. Each time the sum of two numbers appearing on them is noted and recorded in the following table: Sum 2 3 4 5 6 7 8 9 10 11 12 Frequency 14 30 42 55 72 75 70 53 46 28 15 From the above data, what is the probability of getting a sum (i) more than 10 (ii) between 8 and 12.

**Topperlearning User**11th December 2013, 3:40 AM

### CBSE - IX - Mathematics - Probability

## Following distribution gives the weight of 38 students of a class. Weight in kg. 31 - 35 36 - 40 41 - 45 46 - 50 51 - 55 56 - 60 61 - 65 66 - 70 71 - 75 No. of students 9 5 14 3 1 2 2 1 1 Find the probability that weight of student in the class is (i) at most 60 kg. (ii) at least 36 kg. (iii) not more than 50 kg.

**Topperlearning User**11th December 2013, 3:37 AM

### CBSE - IX - Mathematics - Probability

## The age (in years) of workers are as follows: Age (in yrs) 10 - 19 20 - 29 30 - 39 40 - 49 50 - 59 60 and above No. of workers 5 40 26 15 8 6 If a worker is selected at random, find the probability that the person is: (a) 30 years or more (b) below 50 years

**Topperlearning User**11th December 2013, 3:34 AM

### CBSE - IX - Mathematics - Probability

## The percentage of marks obtained by a student in monthly unit test are given below: Unit Test 1 II III IV V % Marks 70 72 65 68 85 Find the probability that the student gets (a) more than 70% marks (b) more than 90% marks

**Topperlearning User**11th December 2013, 3:32 AM

### CBSE - IX - Mathematics - Probability

## The weekly pocket money of students are given in the following table: Pocket Money (in Rs) Number of students 145 7 140 4 159 10 171 6 158 3 147 8 165 12 Find the probability that the weekly pocket money of a student is: (a) Rs 159 (b) more than Rs 159 (c) Less than Rs 159

**Topperlearning User**11th December 2013, 3:29 AM

### CBSE - IX - Mathematics - Probability

## Following table shows the marks obtained by 30 students in a class test: Marks Obtained 70 58 60 52 65 75 68 Number of Students 3 5 4 7 6 2 3 Find the probability that a student secures (a) 60 marks (b) less than 60 marks.

**Topperlearning User**11th December 2013, 1:20 AM

### CBSE - IX - Mathematics - Probability

## 12 packets of salt, each marked 2 kg, actually contained the following weights (in kg) of salt: 1.95, 2.02, 2.06, 1.98, 2.03, 1.97, 2.04, 1.99, 1.985, 2.025, 2.00, 1.98 Out of these packets one packet is drawn at random. What is the probability that the chosen packet contains more than 2 kg of salt?

**Topperlearning User**11th December 2013, 1:12 AM

### CBSE - IX - Mathematics - Probability

## A survey at a university was conducted among 880 students. Of these, 500 identified themselves as "smokers". Compute the empirical probability that a randomly selected student is not from a "smoker".

**Topperlearning User**11th December 2013, 1:10 AM

### CBSE - IX - Mathematics - Probability

## Two coins are tossed simultaneously 1000 times with the following frequencies of different outcomes: Outcomes 2 Heads 1 Head No Head Frequency 190 560 250 Find the probability of occurrence of each of these events.

**Topperlearning User**11th December 2013, 1:09 AM

### CBSE - IX - Mathematics - Probability

## Three unbiased coins are tossed together. Find the probability of getting (i) Two heads (ii) At least two heads (iii) No head

**Topperlearning User**11th December 2013, 1:05 AM

### CBSE - IX - Mathematics - Probability

## A bag contains cards numbered form 2 to 25. A card is drawn at random from the bag. Find the probability that selected card bears a number which is multiple of 2 and 3.

**Topperlearning User**11th December 2013, 12:54 AM

### CBSE - IX - Mathematics - Probability

## Fifty seeds were selected at random from each of the 5 bags of seeds and kept under standardized conditions favorable for germination. After 20 days the number of seeds which had germinated in each collection were counted and recorded as follows: Bags 1 2 3 4 5 Number of seeds Germinated 40 48 42 39 41 What is the probability of germination of: (i) More than 40 seeds in a bag? (ii) 49 seeds in a bag? (iii) More than 35 seeds in a bag?

**Topperlearning User**11th December 2013, 12:51 AM

### CBSE - IX - Mathematics - Probability

## A die is thrown 400 times. The frequency of the outcomes of the events are given as under: Outcomes 1 2 3 4 5 6 Frequency 70 65 60 75 62 68 Find the probability of: (i) Occurrence of an even number. (ii) Occurrence of a number less than 2.

**Topperlearning User**11th December 2013, 12:49 AM

### CBSE - IX - Mathematics - Probability

## A bag contains cards numbered from 1 to 25. A card is drawn at random from the bag. Find the probability that selected card bears number which is multiple of 2 or 3.

**Topperlearning User**11th December 2013, 12:44 AM

### CBSE - IX - Mathematics - Probability

## The following data shows the blood groups of 40 students of a class: Blood group A AB B O No. of students 10 15 12 3 A student is selected at random from the class. Find the probability that the child: (i) has blood group A (ii) has blood group O (iii) does not have blood group AB

**Topperlearning User**11th December 2013, 12:38 AM

### CBSE - IX - Mathematics - Probability

## Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes: Outcomes 3 heads 2 heads 1 head No heads Frequency 23 72 77 28 Find the probability of getting (i) 3 heads (ii) at least two heads (iii) two heads and one tail.

**Topperlearning User**11th December 2013, 12:33 AM

### CBSE - IX - Mathematics - Probability

## A survey of 10 student is done regarding the likes and dislike about the subject mathematics. The data are given below: Views Number of students Likes 80 Dislikes 20 Find the probability that a student chosen randomly (a) likes mathematics (b) does not like mathematics

**Topperlearning User**11th December 2013, 12:08 AM

### CBSE - IX - Mathematics - Probability

## One card is drawn at random from a well shuffled deck of 52 cards. Find the probability for getting a face card.

**Topperlearning User**11th December 2013, 12:05 AM