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If np4:np5=1:2 find n |
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Answer» n/(n-4)!/n/(n-5)!=1/2(n-5)!/(n-4)(n-5)!=1/21/(n-4)=1/2n-4=2n=2+4n=6 it is right -n!/(n-4)! ÷ n!/(n-5)! = 1:2n!/(n-4)(n-5)! × (n-5)!/n! = 1:21/(n-4) = 1:2n-4=2n=6 it\'s wrng bro n!/(n-4)!/n!/(n-5)!=1/2 (n-5)!/(n-4)!=1/2 (n-5)!/(n-4)(n-5)!=1/2 (n-4)=1/2 2n-8=1=2n=9 n=9/2 |
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