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Question

Four employees enter into a conference hall where there are 8 seats. The number of ways they can choose their seat is .

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Solution

Given their are 8 seats in conference room.
First employee can take one of the 8 seats.
Second can take one of the remaining 7 seats.
Third can take from 6 remaining seats.
And fourth one can take among any of the 5 seats.

Using counting principle, the number of ways they can choose their seats is =8×7×6×5=1680.

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