Q 2432891732.     A square is divided into `9` identical smaller squares.
Six identical balls are to be placed in these smaller
square such that each of the three rows gets at least
one ball (one ball in one square only). In how many
different ways can this be done?

IAS 2005 Prelims
A

`27`

B

`36`

C

`54`

D

`81`

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