Four cards are drawn at random from a well-shuffled pack of 52 cards. Find the probability that there is exactly one pair.
1
(13C1 × 4C2 × 48C1 × 44C2)/(52C4)
2
(13C1 × 4C2 × 48C2 × 44C1)/(52C4)
3
(13C1 × 4C2 × 48C1 × 44C1)/(52C4)
4
(13C1 × 4C1 × 48C1 × 44C1)/(52C4)