Question

A box contains 10 good articles and 6 defective articles. One item is drawn at random. The probability that it is either good or has a defect, is
(a) 64/64
(b) 49/64
(c) 40/64
(d) 24/64

Answer 1

(a) $\frac{64}{64}$

The answer is one, because the article would be either good or defective as per the question.
Hence, the only option is $\frac{64}{64}=1$.