jaretktm2449
22.08.2021 •
Mathematics
A bag contains 15 white balls and 10 black balls,another contains 20 white balls and 15 white balls.if two balls are drawn without replacement from each bag,find the probability that
a)all four are black
b)exactly one of the four are white
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Ответ:
exactly one of the four are white
Ответ:
the second one
Step-by-step explanation: