Question

Two balls are drown at randome with replce mentfrom abox cantaining9 blaks and 7 white balls. calculate the probability of both balls are black

Answer 1

Hello !

Since the replacement is allowed.

P(A) = probability for 1st chance = 9/16

P(B) =probabilty for 2nd chance = 9/16

total probabilty = P(A)*P(B) = 81/256

Hope it helps !

Have a nice day !!