A bag contains 4 blue , 5 red , and 7 green balls .If 4 balls are drawn one by one with replacement , what is the probablity that all are blue??
total = 16 balls
blue = 4 balls
green = 7 balls
red = 5balls
probablity of blue balls = 4 = 1
16 4
ans = 1/4
blue = 4 balls
green = 7 balls
red = 5balls
probablity of blue balls = 4 = 1
16 4
ans = 1/4