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If ""^((n+1))P(5): ""^(n)P(5)=3:2, find ...

If `""^((n+1))P_(5): ""^(n)P_(5)=3:2`, find n

Text Solution

Verified by Experts

The correct Answer is:
`rArr n= 11" or "(3)/(2)`
Since n is positive integer, n=11
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Knowledge Check

  • If ""^((n+1))P_(5):""^(n)P_(5)=3:2 then n is

    A
    8
    B
    14
    C
    10
    D
    6

  • I : IF ""^(n+1) P_(5) : ""^(n)P_(5)=3:2 then n=14 . II . IF ""^(56)P_(r-6) : ""^(56)P_(r+3)=30800 : 1 then r= 41.

    A
    Only 1 is ture
    B
    only II is true
    C
    Both I and II are true
    D
    neither a nor II true

  • If ""^(n)P_(4):""^(n)P_(3)=2:1 then is

    A
    5
    B
    8
    C
    7
    D
    6

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