5 In how many ways can a president a secretary and treasurer

5. In how many ways can a president, a secretary, and treasurer be elected from among 8 people

Please see here we have to elect 3 persons ( a president , a secretary and a treausrer ) from among 8 people

As order of selection is important here , so we use permuation here.

So 8 p 3 = 8*7*6 = 336

So we can elect a president, a secretary, and treasurer from among 8 people in 336 ways.