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Evaluate (i) 5 ! (ii) 7 ! (iii) 7 ! – 5!
Evaluate n!/(r!(n-r)!), when n = 5, r = 2.
If 1/8! + 1/9! = x/10!, find x.
Evaluate
Is 3 ! + 4 ! = 7 ! ?
Compute 8!/(6! × 2!)
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