# RD SHARMA Solutions for Class 9 Maths Chapter 25 - Probability

If you love numbers & have a deep interest in statistics, then Mathematics is probably one of the scoring subject ever. A Class 9th CBSE Mathematics is one of the challenging subject one can undergo as, it involves a lot of crunching of complex numbers, geometrical formulae, diagrams & much more. Hence, to simplify the mathematical complexity, TopperLearning has framed a customise solution that involves Test preparation notes, Textbook solutions, Videos, & several other study material that help the student to memorise the concepts quickly. We have bifurcated our CBSE Class 9 Study Material (Solution) into 3 Different parts namely:

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## Chapter 25 - Probability Exercise 25.16

The probability of an impossible event is

(a) 1

(b) 0

(c) less than 0

(d) greater than 1

The probability of an impossible event is always zero since the chances of occurring of that event is zero.

Hence, correct option is (b).

The probability of a certain event is

(a) 0

(b) 1

(c) greater than 1

(d) less than 0

The probability an event of a trial is

(a) 1

(b) 0

(c) less than 1

(d) more than 1

## Chapter 25 - Probability Exercise 25.17

A coin is tossed 1000 times, if the probability of getting a tail is 3/8, how many times head is obtained?

(a) 525

(b) 375

(c) 625

(d) 725

A dice is rolled 600 times and the occurrence of the outcomes 1, 2, 3, 4, 5 and 6 are given below:

Outcome | 1 | 2 | 3 | 4 | 5 | 6 |

frequency | 200 | 30 | 120 | 100 | 50 | 100 |

The probability of getting a prime number is

The percentage of attendance of different classes in a year in a school is given below:

Class: | X | IX | VIII | VII | VI | V |

Attendance: | 30 | 62 | 85 | 92 | 76 | 55 |

What is the probability that the class attendance is more than 75%?

A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is

In a football match, Ronaldo makes 4 goals from 10 penalty kicks. The probability of converting a penalty kick into a goal by Ronaldo, is

## Chapter 25 - Probability Exercise Ex. 25.1

Head : 455, Tail : 545

Compute the probability for each event.

Two coins are tossed simultaneously 500 times with the following frequencies of different outcomes:

Two heads : 95 times

One tail : 290 times

No head : 115 times

Find the probability of occurrence of each of these events.

Number of girls in a family: | 0 | 1 | 2 |

Number of families: | 211 | 814 | 475 |

If a family is chosen at random, compute the probability that it has:

(i) No girl

(ii) 1 girl

(iii) 2 girls

(iv) at most one girl

(v) more girls than boys

Find the probability that on a ball played:

(i) he hits boundary

(ii) he does not hit a boundary.

Units Test: | I | II | III | IV | V |

Percentage of marks obtained: | 69 | 71 | 73 | 68 | 76 |

Find the probability that the student gets:

(i) More than 70% marks

(ii) less than 70% marks

(iii) a distinction.

Following table shows the birth month of 40 students of class IX. |
|||||||||||

Jan |
Feb |
March |
April |
May |
June |
July |
Aug. |
Sept. |
Oct. |
Nov. |
Dec. |

3 |
4 |
2 |
2 |
5 |
1 |
2 |
5 |
3 |
4 |
4 |
4 |

Find the probability that a student was born in August. |

## CBSE Class 9 Maths Homework Help

Clear all your doubts instantly at our “Ask Doubt” section. Get expert help and guidance at your comfort. To know the syllabus in detail, click here.

NCERT Textbooks are the rich stimulant for those students who want to score better in the CBSE examinations. By solving our papers the students have achieved a better and higher result. One of the primary objectives of creating ncert solution for class 9 is that the student gets access to an easy solution; which acts as a strong catalyst in improving the marks. We usually focus that the students don’t find any difficulty in understanding the concepts and can memorize them easily.

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