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The product of r consecutive positive integers is divisible by ….. (a) r! (b) (r – 1)! (c) (r + 1)!

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The product of r consecutive positive integers is divisible by …..

(a) r! 

(b) (r – 1)! 

(c) (r + 1)! 

(d) r!

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(a) r!

1(2) (3) … (r) = r! which is ÷ by r!

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