n!/r!(n-r)! when n=10,r=3
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Answered by
1
Answer:
120
Step-by-step explanation:
10 ! / 3! (10-3)!
10! /3! (7)!
= 10*9*8*7*6*5*4*3*2*1/3*2*1*7*6*5*4*3*2*1
=10*9*8*/3*2*1
=10*3*4
= 120
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