Question

If a number is selected at random form the number 1 to30 the probability that it is a prime number is

Answer 1

10 by 30
means 1: 3.......

Answer 2

S = {1, 2, 3 ............ 29, 30}

n(s) = 30

(E) = }prime numbers}

(E) = { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29}

n(E) = 10

P(E) = 10/30 = 1/3