ii) A box contains 10 white, 7 black and 3 green balls. 2 balls are drawn at random. Find out the probability that: a) both are white

Question

b) one is white and another is green
c) one is black and another is green

Answer 1

10/20 * 9/19

10/20 * 3/19

7/20 * 3/19

Answer 2

2 out of 10