Question

Inhow many ways can 3 postcards can be posted in 5 postboxes?

Answer 1

first post card can be posted in any of the 5 post boxes =5c1 ways

second post card can be posted in any of the 5 post boxes =5c1 ways

third post card can be posted in any of the 5 post boxes =5c1 ways

number of ways=5c1*5c1*5c1=125=5^3

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