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From a committee of 8 persons, in how ma...

From a committee of 8 persons, in how many ways can we choose a chairman and a vice chairman assuming one person can not hold more than one position ?

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Chairman can be selected out of 8 persons in 8 ways. After the selection of chairman, vice chairman can be selected out of 7 persons in 7 ways.
`therefore` out of 8 persons, chairman and vice - chairman can be chosen in (8) (7) = 56 ways.
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