In how many ways can 3 postcards can be posted in 5 postboxes?
Pick:  A) 100  B) 150  C) 175  D) 200  E) 125
First card can go into any of the five boxes,second can go into any of the five boxes.   Third card also can go into any of the five boxes   Number of ways=5*5*5= 
<gadget id="calculator">5*5*5</gadget>
<output>125</output>
125 ways   Option 125
<result>E</result>
In how many ways can 3 postcards can be posted in 5 postboxes?