find the value of n!/r!(n-r)! when n= 8, r=6
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Answer:
n!/r!(n-r)!
n=8,r=6
8!/6!(8-6)!
=>8!/6!*2!
=>(8*7*6*5*4*3*2*1)/(6*5*4*3*2*1)*2
=>(8*7)/2
=>4*7=>28
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