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Question
The heights of 60 students of a class are given in the following table :
| Height(in cm) | 150-155 | 155-158 | 158-160 | 160-165 | 165-172 |
| No. of students | 8 | 20 | 25 | 4 | 3 |
Find the probability that the height of a student lies in the interval
(iii) 158-172
Solution
The total number of students = 60
Total number of students whose height lie in the interval 158 - 172=25+4+3=32
P(Height of a student lies in the interval 158-172)
= `"Number of students whose height lies in the interval 158-172"/"Total number students"`
= `32/60` = `8/15`
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