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primary 6 | Maths
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Maths olympiad question
Date Posted: 7 years ago
Views: 529
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nCr should be n!/((n-r)!*r!) not n!/(n-r)!.
So 8C2 should be 8!/(6!*2!) = (8*7)/2 = 28, not 56.
So 8C2 should be 8!/(6!*2!) = (8*7)/2 = 28, not 56.
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