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There are 12 horses in a race. In how many ways can all the horses finish?
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There are 12 horses in a race. In how many ways can all the horses finish?
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Jan 2, 2019
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There are 12 horses in a race. In how many ways can all the horses finish?
Mathematics
high-school
Vadim Macagon
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Vadim Macagon
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12 horses to fill 3 positions
12 horses to fill 1st opening , when filled
leaves 11 horses to fill 2nd opening , when filled
leaves 10 horses to fill 3rd opening
12 * 11 * 10 ways to fill the 3 spots
Breach
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Jan 4, 2019
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Breach
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1st is 1 of 12.
Then 1 of 11, then 1 of 10
----
= 12*11*10 = 1320 ways
Akaki Kapanadze
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Jan 7, 2019
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Akaki Kapanadze
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