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Question Number 114660 by mohammad17 last updated on 20/Sep/20

Commented by mohammad17 last updated on 20/Sep/20

$$helpmesir$$

Answered by bobhans last updated on 20/Sep/20

$$\frac{9!}{4!.2!}=\frac{9.8.7.6.5}{2}=36\times 210=7560$$

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