Question

A number is chosen at random from Q={1,2,3,. ,10}. Find the probability that the chosen number is either a prime factor of 42 or a multiple of 3?

Answer 1

probability that the chosen number is either a prime factor of 42 or a multiple of 3 = 3/5

Explanation:

Q = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

prime factor of 42 = {2, 3, 7}

multiple of 3 = {3, 6, 9}

probability that the chosen number is either a prime factor of 42 or a multiple of 3,

= 6/10 = 3/5