Question

a bag contains 20 balls out of which X balls are white if one ball is drawn at random the probability of drawing a white ball is why no place is ball and 10 more white balls in the back if a ball is drawn from the bag the probability of drawing the white ball is to Y find x...​

Answer 1

Answer:

A bag contains 20 balls out of which x balls are white

Probability of White Ball  = x/20

=> y = x/20

place this ball and 10 more white balls in the bag

=> White Balls = x + 10

& Total Balls = 20 + 10 = 30

Probability of White Ball  =  (x + 10)/30

=> 2y  = (x + 10)/30

=> 2 (x/20) =  (x + 10)/30

=> 3x = x + 10

=> 2x = 10

=> x = 5