Two card is pick at random from a deck of cards what is the probability that both cards will be 10?

Our sample space is , as this is the combination for all of the ways in picking 2 cards out of the 52 cards, assumingly.
Now, there are 4 10 cards, one of each suit.

Thus, in order to pick 2 of the 4, we use the notation: to pick 2 10 cards

Therefore, our probability becomes:

:D