A shipment of 220 smartphones contains 84 that are defective. If a customer buys two smartphones at random from the shipment, what is the approximate probability that both phones are defective? Choose the correct choice
A) 1/250
B) 1/84
C) 11/76
D) 1/9
E) 1/3
Probability of chosing one defective phone from a lot of 220 which ontains 84 defective phones is = (84/220)   Probability of chosing one defective phone from a lot of 219(we already picked one) which ontains 83(we already picked one) defective phones is = (83/219)   11/76ombined probability of series of events = product of the probabilities = (84/220)*(83/219)   84/220 is close to (21/55) and (83/219)= (36/95)   so answer is (21/55)*(36/95) = (11/76)   So, answer will be 11/76
<result>C</result>
A shipment of 220 smartphones contains 84 that are defective. If a customer buys two smartphones at random from the shipment, what is the approximate probability that both phones are defective?