In how many ways can 3 postcards can be posted in 5 postboxes? Choose the most appropriate option.
A) 125
B) 286
C) 296
D) 199
E) 167
125ns: First card can go into any of the five boxes, Second can go into any of the five boxes, Third can go into any of the five boxes = 5×5×5=1255×5×5=125   125nswer:125
<result>A</result>
In how many ways can 3 postcards can be posted in 5 postboxes?