Question

If the probability of rain on any given day in Pune city is 50% then what is the probability that it rains on
exactly 3 days in a 5 day period?​

Answer 1

Answer:

The correct answer is 3/5×1/2=3/10

Answer 2

There are only 2 possibilities each day- raining & not raining.

As there is a span of 5 days,

n(S) = 2^5 =32.

Now, we want rain on 3 days.

Ways of choosing 3 from 5 = 5C3 = n(A) =10.

Probability = 10/32 = 5/16.