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NDA Math Probability

Question : 63 of 100

Marks: +1, -0

Solution:

In month of December 31 daysi.e.

(28+3)

days.

In 28 days will get 4 Sundays

If we get any Sunday in first 3 days of December than only we can get 5 Sundays in month.

n(5th Sunday)=3 [4 Weeks+3 days]

n(5)=7

Hence prob.of 5 Sundays in month of December

=\frac{3}{7}

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