rainbowsadie7140
20.11.2020 •
Mathematics
The table lists the top four times for the 50-yard freestyle at a swim meet. Who had the fastest time?
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Ответ:
5+5 = 10 total marbles
5/10= 1/2 probability of picking a white one first
then you have 9 marbles so a 5/9 chance of picking a black one
1/2 x 5/9 = 5/18 probability of choosing a white then a black marble