Probability| Worksheet Solutions| Class 9

Worksheet solutions for chapter: Probability for class 9 are provided below.

(1) The result of a survey of 1000 persons about a movie is showing below –

Opinion Number of persons
Likes 620
Dislikes 480

Find the probability of a person chosen random to dislike the movie.

 

Ans-

(2) A girl went to market to purchase a dress. The shop has dresses in different colours. The table below is showing data-

Colour of dress Number of dress
Red 4
Green 3
Yellow 2

Find the probability of picking a red colour dress.

Ans-

(3) Heights (cm) of 9 persons are as follows:

160        159     160.5      162    166     155    154    170    156

Find the probability that any of these person chosen at random who has height more than 160 cm.

Ans-

(4) Marks of 30 students of class 9 for mathematics are as follows-

45     75     78     89     55    99     100     65    79    80

82.5  88     96     97     94      89     93      91     56   67

69    91.5    64    65     75      78      48        90    95  99.5

(i) Find the probability that a student get marks less than 60.

(ii) Find the probability that a student get marks more than 60.

Ans-

(5) A group of sweat lover prepares a table of different sweats liked by the number of 50 members. The table is as follows:

Name of sweat Sweat liked by the members
Burfi 10
Jalebi 6
Imerti 8
Milk cake 12
Kheer 10
Kalakand 4

Find the probability of that a member chosen at random

(i) likes milk cake     (ii) likes burfi

Ans-

(6) A bag has 20 red, 25 green and 30 black balls.

(i) Find the probability to take out red ball.

(ii) Find the probability of taking out 1 black and 1 yellow ball simultaneously.

Ans-

(7) A book shelf has books as follows-

Books Number of books
History 5
English 2
Hindi 4
Mathematics 5

Find the probability of taking out a book of History from the book shelf.

Ans-

(8) In a bus 30 passengers are travelling. Information are given below –

Age of the Passengers(Years) Male Passengers Female Passengers
Less than 10 2 1
10 – 20 1 4
20 – 30 2 4
30 – 40 5 3
40 – 50 2 6

Find the probability that a passenger chosen at random

(i) Male passengers aged 20 – 30.

(ii) Female passengers aged 40 – 50

Ans-

Choose the correct answer-

(9) The probability of an event lies between

(i) 1 and 2

(ii) 0 and 1

(iii) None of the above

Ans-

Ans-

Helping Topics

Probability

NCERT Solutions Class 9