Question

A bag contains 18 balls out of which x balls are red (i) if one ball is drawn at random from bag, find probability that it is not red. (ii) if 2 more red balls are put in the bag, the probability of drawing a red ball in will be 9/8 times the probability of drawing a red ball in first case. find value of x.

Answer 1

hence X = 18.25 .I.e the red balls