Question

Directorate of Education, GNCT of Delhi
Subject: Mathematics
Worksheet: 91
Date: 26 February, 2021
Class: IX Name of the Student:
Name of the Class Teacher:
Chapter 15: Probability
The weights of students were recorded during the medical check-up of a class. The following frequency distribution
table gives the weights of 200 students of a class.
Read the table carefully and answer the questions given below.
Weight( in kg)
Number of students
31 - 35
36 - 40
41 - 45
46 - 50
51 - 55
56 - 60
61 - 65
66 - 70
71 - 75
17
46
52
34
27
11
8
3
2
If a student is selected at random, find the probability that the weight of the student is
1) in the interval 46 - 50 kg
(a) 0.12
(b) 0.17
(c) 0.34
(d) 0.52
2) less than or equal to 60 kg
(a) 0.638
(b) 0.775
(c) 0.782
(d) 0.935
3) above 50 kg
(a) 0.125
(b) 0.225
(c) 0.255
(d) 0.315
4) from 41 kg to 55 kg
(a) 0.525
(6) 0.555
(c) 0.565
(d) 0.585
5) not less than 31 kg
(a) 0
(b) 1.03
(c) 1
(d) 1.01
COVID appropriate behaviour (CAD) message:
Wash your hands will sonp and water regularly.


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