SOLUTION: In a scientific study there are 12 guinea pigs, 9 of which are pregnant. If three are selected at random without replacement, find the probability that none are pregnant.
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-> SOLUTION: In a scientific study there are 12 guinea pigs, 9 of which are pregnant. If three are selected at random without replacement, find the probability that none are pregnant.
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Question 470213: In a scientific study there are 12 guinea pigs, 9 of which are pregnant. If three are selected at random without replacement, find the probability that none are pregnant.
-- I could figure this problem out if it were asking the probability of all three selected are pregnant, but I can't seem to find the right answer to this question. What are the steps/the formula to solve this?
Thanks so much! Answer by scott8148(6628) (Show Source):
