Q. A box contains 10 good articles and 6 with defects, one article is chosen at random. What is the probability that it is either good or has a defect?
A) $\frac{24}{64}$
B) $\frac{40}{64}$
C) $\frac{49}{64}$
D) 1
Explanation
(d)
$\therefore$ Required probability$= \frac{\ ^{10}C_{1} +^{6}C_{1}}{\ ^{16}C_{1}}$
$= \frac{16}{16} = 1$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.