Question

Two cards are dealt from a standard deck. What is the probability that they form a pair?

Answer 1

For the first pick, the person can choose any card from the given 52 cards. Then, whatever number the card shows, there remain 3 cards of the same rank in the deck. So, for both the cards to be of the same rank, the person has to choose the second card from these 3 remaining cards.

Therefore, the probability that these two cards form a pair is:

Answer 2

The "First" card doesnt matter, as only the second card has to have the same rank. After removing one card, there are 51 cards left in the deck. 3 of them have the same rank as the card that was removed.

Explanation:

Got it off google.