Originally Posted by

**ajlakanen** Hello,

let's assume we draw a set of four numbers, each of which can be 1, 2 or 3.

Then we draw a set of two numbers, each can be 1, 2 or 3.

Now, what is the probability that both numbers of the latter set exist in the first set?

Example 1: first set is {3, 1, 1, 2}, second {1, 2} ==> OK (both 1 and 2 are in the first set)

Example 2: first set is {3, 1, 1, 2}, second {2, 2} ==> Not OK (theres only one pieces of 2's in the first set, not two).

Sorry for my bad English.

Cheers,

Antti-Jussi