RioAnne
7. What is the value of 7P3? with permutations



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anonymous
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\[7\times 6\times 5\]

RioAnne
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210

RioAnne
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840?

myininaya
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210 is right

myininaya
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\[n P r=\frac{n!}{(nr)!}\]

myininaya
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that is the formula

myininaya
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\[7 P 3=\frac{7!}{(73)!}=\frac{7!}{4!}=\frac{7 \cdot 6 \cdot 5 \cdot 4!}{4!}=7 \cdot 6 \cdot 5 \]