The following table shows a student's percentage of marks on monthly unit tests:

The probability that the student gets distinction is:

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12

35

56

15

answer is D.

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Detailed Solution

Given a table that shows a student’s % of marks on monthly unit tests.
Question Image

We have to find the probability of the student that gets distinction.
The probability of an event A is given by,

P (A) = Number of favourable outcomes T o t a l number of outcomes

From the table, the total number of unit test, n(S) = 5.
Let C be the event of student getting a distinction (getting marks greater than 75), then,

C = {76} ⇒ n C = 1

The probability that the student gets the distinction is given by,

P (C) = n (C) n (S) ⇒ P (C) = 15

The probability that the student gets the distinction is

15 .

Hence, option 4 is correct.

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