Question

A number is chosen from 1 to 15, find the probability that the chosen number is a prime number:

• A. $\frac{2}{5}$
• B. $\frac{3}{5}$
• C. $\frac{4}{5}$
• D. $1$

Answer 1

The correct option is A $\frac{2}{5}$

Probability = $\frac{No.offavourableoutcomes}{Totalno.ofoutcomes}$

Prime numbers from 1 to 15 = 2, 3, 5, 7, 11 and 13

Number of prime numbers = 6

Total numbers between 1 and 15 = 15

So, the probability of finding a prime number $=\frac{6}{15}=\frac{2}{5}$