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

Answer 1

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`