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Question Number 110156 by I want to learn more last updated on 27/Aug/20

$$\mathrm{If}\mathrm{we}\mathrm{have}5\mathrm{people},\mathrm{how}\mathrm{many}\mathrm{ways}\mathrm{can}\mathrm{they}\mathrm{be}\mathrm{seated}\mathrm{in}\mathrm{a}\mathrm{row}$$$$\mathrm{on}\mathrm{a}\mathrm{chair},\mathrm{if}\mathrm{their}\mathrm{are},$$$$\left(\mathrm{a}\right)7\mathrm{chairs}\left(\mathrm{b}\right)3\mathrm{chairs}\mathrm{available}$$

Answered by mr W last updated on 28/Aug/20

$$\left(a\right)$$$$P_5^7=2520$$$$\left(b\right)$$$$P_3^5=60$$

Commented by I want to learn more last updated on 28/Aug/20

$$\mathrm{Thanks}\mathrm{sir}$$

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