store has 37 cameras and 2 are defective and sold 25 what are the chances 1 defected camera was sold

The total number of combinations of 25 out of 37 sold is:  37nCr25

Choosing 1 out of 2 defective:  2nCr1

Choosing 24 out of 35 good:  35nCr24

Probability:   [ 2nCr1 · 35nCr24 ] / 37nCr25