Solution:
We can choose one denomination in ways, then cards of this denomination can be chosen
in ways and one remaining card can be chosen in ways. Thus, the total number of choices is
.
The number of ways of selecting 4 cards of an ordinary pack of playing cards so that exactly 3 of themare of the same denomination is
The number of ways of selecting cards of an ordinary pack of playing cards so that exactly of them
are of the same denomination is
