Question 1131142
The easiest way to do this is find probability no defective cards are chosen and subtract that from one
(6/21)*(5/20)*(4/19)*(3/18)=0.0025, so answer is 1-0.0025 =0.9975

For 14, (7/21)(6/20(5/19)(4/14)=0.0058, so answer is 0.9942.