Use your dice and cards reference sheets to help you answer the following questions. Given that a card dealer hands you a spade,
what is the probability that it is the Jack of Spades?
A. 1/52
B. 1/13
C. 1/4
D. 1/12
1 answer:
The correct answer is B) 1/13.
P(Jack of spades given spades) = P(J|spades) = P(spades and J)/P(spades)
There is 1 Jack of spades out of 52 cards; P(spades and J) = 1/52
There are 13 spades out of 52 cards; P(spades) = 13/52 = 1/4
1/52 ÷ 1/4 = 1/52 × 4/1 = 4/52 = 1/13
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