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The percentage of marks obtained by a student in monthly unit tests are given below :

Unit test: I II III IV V
% of marks obtained: 69 71 73 68 76

Find the probability that the student gets :

(i) More than 70% marks

(ii) Less than 70% marks

(iii) A distinction.

1 Answer

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Best answer

Let,

(i) E be the event of getting more than 70% marks

The number of times E happens = 3

P(A) = \(\frac{3}{5}=0.6\)

(ii) F be the event of getting less than 70% marks

The number of times F happens = 2

 P(B) = \(\frac{2}{5}=0.4\)

(iii) G be the event of getting a distinction

The number of times G happens = 1

P(C) = \(\frac{1}{5}=0.2\)

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