Question

An urn contains 15 balls of which 4 are red, 8 are black and the others are white.
3 balls are selected one after the other and without replacement from the urn.
1) Consider the following events :
B: « The three balls are red ».
C: « The three balls have the same colors ».
D: « At least one of the three balls is white ».
a) Calculate P(B), P(C) and P(D).
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Answer 1

Answer:

D

Step-by-step explanation:

because it is replaced by a b