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If np4:np5=1:2 find n

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If np4:np5=1:2 find n

    • Posted by Jay Narayan Yadav 7 years, 2 months ago

    CBSE > Class 11 > Mathematics
    • 4 answers

    Suman Sharma 7 years, 2 months ago

    n/(n-4)!/n/(n-5)!=1/2 (n-5)!/(n-4)(n-5)!=1/2 1/(n-4)=1/2 n-4=2 n=2+4 n=6

    0Thank You

    Sahil Srivastava 7 years, 2 months ago

    it is right - n!/(n-4)! ÷ n!/(n-5)! = 1:2 n!/(n-4)(n-5)! × (n-5)!/n! = 1:2 1/(n-4) = 1:2 n-4=2 n=6

    0Thank You

    Sahil Srivastava 7 years, 2 months ago

    it's wrng bro

    0Thank You

    Anurag Shakya 7 years, 2 months ago

    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

    0Thank You

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