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Mathematics 10 Online
OpenStudy (anonymous):

one card is selected at random from a standard deck of cards, find the probability that the card is black or a face card.

OpenStudy (anonymous):

How many cards are black

OpenStudy (anonymous):

How many cards are face cards but not black

OpenStudy (anonymous):

13/52 probability of the black card 4/52 probability of the face card 13/52 + 4/52 - 1/52 = 4/13 is the answer

OpenStudy (anonymous):

redepsilon.. there are 26 black cards?

OpenStudy (sandra):

hmmm, probability of black card is 26/52 (spades and clubs)

OpenStudy (anonymous):

There would be 8 red face cards??? 8/52

OpenStudy (sandra):

so there are ALSO JQKA of the two reds

OpenStudy (sandra):

yep

OpenStudy (anonymous):

so u know the answer?

OpenStudy (anonymous):

5/13

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