P(atleast 1 pair) = 1 – P(0 pair)
P(0 pair) is when all gloves drawn are different
1st glove: 1 (any of 16)
2nd glove: 14/15 (after 1st draw, 15 remain, glove identical to 1 is not to be picked)
3rd glove: 12/14 (after 2nd draw, 14 remain, gloves identical to 1,2 are not to be picked)
4th glove: 10/13 (after 3rd draw, 13 remain, gloves identical to 1,2,3 are not to be picked)
P(0) = 1* (14/15) * (12/14) * (10/13) = 0.6154
P(atleast 1) = 1 – P(0) = 0.3846