# 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.

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(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.

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(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.

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(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.

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(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

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(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.

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(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.

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(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

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(9) The probability of an event lies between

(i) 1 and 2

(ii) 0 and 1

(iii) None of the above

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Helping Topics

Probability

NCERT Solutions Class 9