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Math Help - word probability problem

  1. #1
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    word probability problem

    A card is drawn from a deck of cards numbered one through twenty. The card is NOT replaced and another card is drawn. Find the probability that a prime number is drawn and then a composite number.
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  2. #2
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    there are 20 cards, between the 20 first numbers,there are 8 primers numbers
    so the probability that the first card is primer is 8/20=2/5
    after one card is out,they are 19 cards left,and between those cards,there are there are 11 composite numbers....the probability that the second one is a composite card is 11/19
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  3. #3
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    and then you multiply both...2/5.11/19=22/95
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