Rineesh

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How many combinations of 5 dominoes can be taken from a set of 28 such that 3 dominoes has a same number in it.

How many combinations of 5 dominoes can be taken from a set of 28 such that 3 dominoes has a same number in it.
The dominoes are formed as followes.
Each domino will have 2 numbers in it. The numbers will be any in between 0 and 6 (both read more ..

Rineesh Jun 12, 2017