In a box of 12 pens, a total of 3 are defective. If a customer buys 2 pens selected at random from the box, what is the probability that both pen will be defective? Choose the correct answer:
A) 1/6
B) 2/9
C) 6/11
D) 9/16
E) 3/4
Method- 1   There are 9 fine pieces of pen and 3 defective in a lot of 12 pens   i.e. Probability of first pen being defective = (1/3)   i.e. Probability of Second pen being defective = (1/2)   Probability of Both pen being defective = (1/2)*(1/3) = 1/6   1/6nswer: option 1/6
<result>A</result>
In a box of 12 pens, a total of 3 are defective. If a customer buys 2 pens selected at random from the box, what is the probability that both pen will be defective?