Question

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

Answer 1

First answer is 18-x/18 and second is x=8