Question

The probability that number selected at random from the numbers $1,2,3,4,5,6,7,8,...,100$ is a prime, is

• A. $0.4$
• B. $0.25$
• C. $0.45$
• D. $0.43$

Answer 1

The correct option is B

$0.25$

Explanation for correct option :

Total number of outcome $=100$

Number of prime number between $1$to $100$ $=25$

Probability that the number selected is prime number $=$prime number between $1$to $100$ $÷$total outcome
$$\begin{gathered} =\frac{25}{100} \\ =0.25 \end{gathered}$$

Hence, option (B) is correct .