SOLUTION: Thirteen people are entered in a race. If there are no ties, in how many ways can the first two places come out?
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-> SOLUTION: Thirteen people are entered in a race. If there are no ties, in how many ways can the first two places come out?
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Question 31087
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Thirteen people are entered in a race. If there are no ties, in how many ways can the first two places come out?
Answer by
venugopalramana(3286)
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ANY ONE OF THE 13 CAN BE IN THE FIRST PLACE.
THEN ANY ONE OF THE REST 12 CAN BE IN THE SECOND PLACE
SO TOTAL NUMBER OF POSSIBILITIES = 13*12=156