5. A bag contains 5 white, 7 Red and 8 Black balls. It four balls are drawn without replacement then find the probability that all are white.
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https://www.meritnation.com/ask-answer/question/a-bag-contains-5-white-7-red-4-black-balls-four-balls-are/probability/9014675
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https://www.meritnation.com/ask-answer/question/a-bag-contains-5-white-7-red-4-black-balls-four-balls-are/probability/9014675
Regards.