There are 10 defective bulbs in a group of 100 bulbs. If a sample of 8 bulbs are selected at random then find the probability that:
(i) in this sample 3 bulbs are defective and 5 are non-defective.
(ii) in this sample at least one bulb is defective.

Answer

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

Explanation

N/a