Finite Math

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True or false. P (n, r) = r! C (n, r).
explain why please, thanks

  • Finite Math -

    LS = P(n,r)
    = n!/(n-r)!

    RS = r! C(n,r)
    = r! n!/(r!(n-r)! )
    = n!/(n-r)!
    = LS

    True!

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