The value of n Pr-n Cr is

nbsp; nbsp; Prn #160; #247; #160;Crn=PrnCrn=n!n r! #215;n r! #160;r!n! Therefore, nbsp; nPr divide; nCr nbsp; = r ...

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Raw Data and Collection of Data

The value of ...

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The value of ⁿP_r + ⁿC_r is ___________.

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^{n} P_{r} =^{n} P_{r + 1}

^{n} C_{r} =^{n} C_{r - 1}

r

If $^{n} C_{r}$ = $^{n} C_{r - 1}$ and $^{n} P_{r}$ = $^{n} P_{r + 1}$ , then the value of n is

^{n} P_{r} =^{n} P_{r + 1}

^{n} C_{r} =^{n} C_{r - 1}

n

r

^{n} P_{r} =^{n} P_{r}_{+}_{1}

^{n} C_{r} =^{n} C_{r}_{-}_{1}

^{n} P_{r} =^{n} P_{r + 1}

^{n} C_{r} =^{n} C_{r - 1}

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