(i) There are 100 bulbs in a box, out of which 10 are defective. In a sample of 5 bulbs, what is the probability than no bulb is defective?
(ii) It is known that 5% of the bulbs manufactured in a factored are defective. Find the probability that out of 10 randomly selected bulbs, not more than two are defective.

Answer

(i) `(.^(90)C_(5)xx.^(10)C_(3))/(.^(100)C_(8))` (ii) `-(.^(90)C_(8))/(.^(100)C_(8))`

Explanation

N/a