10 cards numbered are kept in a bag . if one card is taken out of bag the probality of the number on one card is a composite number
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There are 10 ways to choose the first card times 9 ways to choose the second card, equals 90. If first even and second odd, there are 5 times 5 equals 25 ways. If first odd and second even, there are 5 times 5 equals 25 ways. If both even, there are 5 times 4 equals 20 ways. 25+25+20 = 70. 70/90 = 7/9
Step-by-step explanation:
25+25+20 = 70. 70/90 = 7/9
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