Question

The probability that a number selected at random from the first 100 natural numbers is a composite number is ?
A) 3/2
B) 2/3
C) 1/2
D) 34/7

Answer 1

Q:

The probability that a number selected at random from the first 100 natural numbers is a composite number is  ?

A) 3/2
B) 2/3
C) 1/2
D) 34/7

Answer:   A) 3/2 

Read Description:

Number of exhaustive events = 100 C₁ = 100.

We have 25 primes from 1 to 100.

Number of favourable cases are 75.

Hence, Required probability = 75/50 = 3/2.

Hope It Helps!

Answer 2

The number of exhaustive events = 100 C₁ = 100.

We have 25 primes from 1 to 100.

Number of favourable cases are 75.

Required probability = 75/50 = 3/2.
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