Attempt any three

The two digit numbers that can be formed using the digits 0, 1, 2, 3, 4 without repeating digits are

∴ S = {10, 12, 13, 14, 20, 21, 23, 24 30, 31, 32, 34, 40, 41, 42, 43}

∴ n(S) = 16

(a) Let A be the event that the number formed is even number

A = {10, 12, 14, 20, 24, 30, 32, 34, 40, 42}

n (A) = 10

P (A) = n (A)/n (S)

∴ P (A) = 10/16

∴ P (A) = 5/8

(b) Let C be the event that number formed is prime number

C = {13, 23, 31, 41, 43}

n (C) = 5

P (C) = n (C)/n (S)

∴ P (C) = 5/16