Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

A box contains 20 balls bearing numbers 1, 2, 3, 4 … 20. A ball is drawn at random from the box. What is the probability that the number on the ball is (i) divisible by 2 or 3 (ii) not divisible by 10?
Asked by Topperlearning User | 27 Jul, 2017, 04:28: PM
answered-by-expert Expert Answer

Total number of outcomes = 20

(i) Numbers "divisible by 2" are 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, i.e., 10 in number.

Numbers "divisible by 3" are 3, 6, 9, 12, 15, 18, i.e., 6 in number.

Number "divisible by 2 and 3" are 6, 12, 18, i.e., 3 in number.

Number of favourable outcomes = 3

\\Required probability ==

 

(ii) Numbers divisible by 10 are 10, 20, i.e., 2 in number.

\\ Numbers which are not divisible by 10 = 20 - 2 = 18

\\ Required probability =

Answered by | 27 Jul, 2017, 06:28: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
an integer is chosen at random from the first 50 positive integers . what is the probability that the chosen integer is divisible by 5
question image
Asked by aadityaanand2008 | 02 Jan, 2023, 11:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5 black balls. Two balls are transferred at random from Bag I to Bag II and then a ball is drawn from Bag II. The ball so drawn is found to be red in color. Find the probability that the transferred balls were both black. Answer soon
Asked by Trisha Gupta | 23 Sep, 2021, 06:57: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
if x is the number of black marbles from a set of 40 colourful marbles, another 30 black marbles are added to it and the probability becomes twice as the first case , what is the value of x
Asked by acshanadhana15 | 06 Aug, 2020, 01:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
  How many numbers are there BETWEEN 500 and 1000? (Needed for a probability question)
Asked by drhimasingh | 09 Mar, 2020, 11:06: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
1.What is the probability that a leap year has 52 Mondays? 2.Two numbers 'a' and 'b' are selected successively without replacement in that order from integers 1 to 10.The probability that a\b is an integer is   
Asked by officialmehak26 | 03 Feb, 2020, 03:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
a mising helicopter is reported to have crashed in a rectangular region of 7000 sq km. what is the probability that it has crashed in a circular lake of radius 10 km
Asked by ishaktirki | 11 Oct, 2019, 03:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
A bag contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box the probability of drawing a black ball is now double of what it was before. Find x.
Asked by deadpoolaviral26 | 22 Sep, 2019, 09:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
what is the probability for a family with three children to have a boy and 2 girls (Assuming the probability of having a boy and a girl is equal)?? . . . Is the answer 1/3 and 2/3  
Asked by shivamshyama | 03 Oct, 2018, 07:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
A die is thrown, find the probability of the event of getting a square number.
Asked by abhijeet.mishra | 10 Mar, 2018, 04:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
A die is thrown once. Find the probability of getting (i) a prime number. (ii) a number divisible by 2
Asked by Topperlearning User | 08 Nov, 2017, 01:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×