A number is chosen at random from 15
– 24 inclusive. Find the probability that it is a prime or a multiple of 2.

__Solution__*THIS IS A MUTUALLY EXCLUSIVE EVENT*

Let n(S) represent sample space

P(M) = probability of a multiple of
2

P(R) = probability of prime number

n(S) = {15, 16, 17, 18, 19, 20, 21,
22, 23, 24} = 10

n(M) = {16, 18, 20, 22, 24, 26 } = 6

n(R) = {17, 19, 23} = 3

P(M) =

^{6}/10
P(R) =

^{3}/10
………………………….

P(MuR) = P(M) + P(R)

P(MuR) =

^{6}/10 +^{3}/10
=

^{9}/10**P(MuR) =**

^{9}/10 answer

__TRY THIS…………………__
A number is chosen at random from 16
– 30 inclusive. Find the probability that it is a prime number or a multiple of
3.

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