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If ^nP4=12xx ^nP2, find n....

If `^nP_4=12xx ^nP_2`, find n.

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Knowledge Check

  • If ^nP_3= n^P_2 , then find the value of n.

    A
    3
    B
    7
    C
    9
    D
    5
  • If ^nC_x = 56 and ^nP_x = 336 , find n and x.

    A
    7, 3
    B
    8, 4
    C
    8, 3
    D
    9, 6
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    (i) If nP_(6)=30xx^(n)P_(4) then prove that n=10

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