In a box containing 100 bulbs, 10 are defective. The probability that out of a sample of 5 bulbs none is defective, is:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $\left(\frac{9}{10}\right)^5$
$P(X=5)={^5C}_5×(\frac{9}{10})^5×(\frac{1}{10})^0$
$⇒(\frac{9}{10})^5$ probability of selecting non defective bulbs using binomial distribution