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23 August, 16:28

You randomly select 7 students from a class with 15 male and 20 female students. what is the probability that you will choose exactly 4 females?

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  1. 23 August, 18:28
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    0.3278 Use combination formula ((20C4) * (15C3)) / (35C7) = 0.3278 20C4 - combinations of 4 females from 20 15C3 - combinations of 3 males from 15 35C7 - all possible combinations of 7 students from 35 students in total
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