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There are 24 children in a class, 16 brown-haired and 8 black-haired. Two students are randomly selected find the the probability of picking 2 brown-haired children.
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16c2/24c2
What do you mean?
to get 2 brown-haired u can get them from 16 brown-haired only so no of favourable chances are 16c2 total chances are 24c2 as there totally 24 no of pepple
(16/24)(15/23)
= 10/23
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