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aliina [53]
3 years ago
13

Hi i am Grace and i realllyyyyyy need help on this. If you could please help that would be great.

Mathematics
1 answer:
uranmaximum [27]3 years ago
7 0
The probability of picking a black ball first is \dfrac{4}{5}, because there are 4 black balls and 1 white ball which is 5 balls in total. After picking the first ball, 4 balls remain - 3 black and 1 white, so the probability of picking a white ball is \dfrac{1}{4}.
So, the probability of picking a black ball first followed by a white ball is \dfrac{4}{5}\cdot\dfrac{1}{4}=\dfrac{1}{5}
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Step-by-step explanation:

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Step-by-step explanation:

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