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Mathematics 15 Online
OpenStudy (anonymous):

A card is drawn from a well-shuffled deck of 52 cards. Find the probability of drawing a black 7 or a red 8

OpenStudy (anonymous):

Well, there are two black 7s and two red 8s, out of the 54, so 2+2 = 4 So your chance is 4/52 or 1/13 to get those cards.

OpenStudy (anonymous):

thank you @Zelda

OpenStudy (anonymous):

Oops, the first time I said 54, it's a 52 >.> But no problem kiddo.

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