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| Going for gold |
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Guest
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they are not same.
10.9.8 is equal to 10!/(10-3)! |
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| Re: Going for gold |
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Ron Purewal
MGMAT STAFF
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if you expand out (c), you'll notice that it differs from (a): (c) = (10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1) / (3 x 2 x 1) = 10 x 9 x 8 x 7 x 6 x 5 x 4 that's not the same as (a). btw, it's not unheard of to have two answers that wind up being equivalent. if that's the case, then both are wrong - because, if one of them were right, then the other one would be right too, and you can't have 2 right answers. |
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cramya
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I think its A) 10*9*8 which 10p3
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Ron Purewal
MGMAT STAFF
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i guess i forgot to mention this, heh heh. yes, the correct answer is (a). because there are three distinct medals being awarded, you can simply multiply the numbers of consecutive possibilities, without having to divide by any "redundancy factor" factorials. |
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| Going for gold |
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