Question

A perfect die is rolled. If the out come is an odd number, the probability that it is a prime is

• A. $\frac{1}{3}$
• B. $\frac{2}{3}$
• C. $\frac{1}{2}$
• D. $\frac{1}{8}$

Answer 1

The correct option is B $\frac{2}{3}$

The out come is an odd number is: $1,3,5$ $=3$ cases
Prime numbers out of odd numbers is: $3,5$ $=$ $2$ cases
Probability that prime numbers out of odd numbers is $=\frac{2}{3}$