Question

A box contains 19 balls bearing number 1,2,3...19. A ballls is drawn at random from the box what is the probability of that number of balls drawn is a prime number

Answer 1

Total no. of outcome =19

No. of prime nos.= 8(that are 2,3,5,7,11,13,17,19)

Therefore p(of getting prime no.)=8/19