In how many ways Principal and a vice Principle can be elected from a team of 20 members? Choose the most appropriate option:
A) 480	B) 380 ways	C) 830	D) 840	E) 540
To do this, if captain is elected first, then we have 20 ways of doing this.   For election of vice-captain, we have only 19 ways left, Bcoz 1 way is already consumed. (Situations like this is called dependent situation. One selection depends upon other selection.)   So, the ans is 20*19= 
<gadget id="calculator">20*19</gadget>
<output>380</output>
380ways.   Ans : 380 ways
<result>B</result>
In how many ways Principal and a vice Principle can be elected from a team of 20 members?