In how many ways Chief Minister and Minister be elected from a team of 10 members? Pick.
A) 128  B) 90  C) 132  D) 143  E) 145
To do this, if captain is elected first, then we have 10 ways of doing this.   For election of vice-captain, we have only 9 ways left, coz 1 way is already consumed. (Situations like this is called dependent situation. One selection depends upon other selection.)   So, the ans is 10*9= 
<gadget id="calculator">10*9</gadget>
<output>90</output>
90 ways.   Answer : 90
<result>B</result>
In how many ways Chief Minister and Minister be elected from a team of 10 members?