Amen T.

asked • 04/26/22

PROBABilITY!! I NEED HELP…..IT MIGHT BE EASY FOR YOU…..

There is a pile of football cards and a pile of baseball cards at a garage sale. The probability that you randomly choose a quarterback from the football cards is 1/15. The probability that you randomly choose a quarterback and a pitcher is 1/315. There are 6 pitcher baseball cards. How many baseball cards are in the pile?

Christopher S.

There are 15 total baseball cards, there are 300 baseball cards from 315. so there is a total of 300 baseball cards. Hope this helps.....
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04/26/22

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Peter R. answered • 04/26/22

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Probability of Q is 1/15 (given). Prob(Q and P) is 1/315 (also given). Prob(Q and P) = 1/15 • 1/x = 1/315, so 1/x (probability of a pitcher) must be 1/21.


There are 6 pitcher cards, so 1/21 = 6/total no. of baseball cds. Total no. baseball cards is 126.


Anyone agree?

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Amen T.

Thank you so much!
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04/26/22

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