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Example Question #1 : Number Theory
If a card is drawn randomly from a regular shuffled 52 card deck, what is the probability that the card is either a spade or a 3?
Possible Answers:
Correct answer:
Explanation:
How many cards in the deck are either a spade or a 3?
There are thirteen spades, including a 3 of spades.
There are four 3's, including a 3 of spades.
Since we are counting the same card (3 of spades) twice, there are actually
distinct cards that fit the criteria of being either a spade or a 3.
Since any of the 52 cards is equally likely to be drawn, the probability that it is a spade or a 3, is
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