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The percentage of the marks obtained by a student in the monthly test are given below:

Test
1
2
3
4
5
Percentage marks obtained
69
71
73
69
74

Find the probability that a student gets more than 70% marks.

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0.5

0.6

0.7

0.8

answer is B.

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Detailed Solution

Concept- To find the ratio of favorable cases in the total cases.
Total no. of unit tests

Number of tests in which the student scored more than

marks

Therefore,
Probability that a student gets more than

marks = No. of tests in which the student scored more than

marks / total no. of tests

Hence, the correct option is 2.

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