Question

a box contains cards numbered 3,5,7,9...,35,37. A card is drawn at random from the box. Find the probability that the numbe on the drawn card is a prime number

Answer 1

The prime numbers from 3,5,7...37 are -
3,5,7,11,13,17,19,23,29,31,37

Total number of primes - 11
Total Numbers- 35

Probability of getting prime no. -
No. of primes/ Total numbers.
= 11/35.