Question

if a number from 1 to 15 chosen at random find the probability of choosing a prime number

Answer 1

probability = 6/15 =2/5

prime no between 1 and 15 --2,3,5,7,11,13

Answer 2

S = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
n(S) = 15

A = {2,3,5,7,11,13}
n(A) = 6

P(A) = n(A) / n(S) = 6/15=2/5