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### Question

49 defective pens are accidentally mixed with 84 good ones. It is not possible to just look at a pen and tell whether it is defective or not. One pen is taken out at random. What is the probability that it is a defective pen?

**A**

${7/19}$.

**B**

$51/133$.

**C**

$8/133$.

**D**

$12/133$.

**Soln.**

**Ans: a**

Out of the total number of pens = 133, the chances favoring defective pen are 49. So the probability is 49/133 = ${7/19}$.