Question

A bag contains 6 red, 4 white and Z black balls. Z balls are drawn at random. What is the probability that the balls drawn are (a) both red (b) 1 white and 1 black (c) same colour (d) different colour Select the correct answer from above options

Answer 1

Here n(s) = (6 + 4. 2)C, = 12C1, (a) Let A:both are red ⇒ n(A)= 6C2 (b) Let B: 1 white & 1 Black (c) Let C1: Both are of same colour. n(c) = 4c2 or 2C1 = 15 + 6 + 1 = 22 (d) Let D both are of different colour no of selections 6C1 x 4C1 or 4C1 x 2C or 6C1 x 2C1 = 24 + 8 + 12 = 44