Question

there are 20 balls in a bag. out of which x balls are red. if four more red balls added in that bag then the probability of getting red ball is 5/4 times the first probability. find the value of x​

Answer 1

Answer:

no of outcomes=20

x=red

x+4/20=5/4

4x+16=100

x=100-16/4

x=21