Question

# 400 students of class X of a school appeared in a test of 100 marks in the subject of socialstudies and the data about the marks secured is as below : Marks securedNumber of Students 0âˆ’25 50 26âˆ’50 220 51âˆ’75 100 Above 75 30Total number of students 400If the result card of a student he picked up at random, what is the probability that the student has secured more than 50 marks.

A
0.586
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B
0.75
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C
0.325
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D
0.1
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Solution

## The correct option is B 0.325Total number of students, i.e , the total frequency =400The total number of students who secured more than 50 marks 100+30=130Probability that the marks secured are more than 50= 130400 = 1.34 = 0.325

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