A lot has 10% defective items. Ten items are chosen randomly

A lot has 10% defective items. Ten items are chosen randomly from this lot. The probability that exactly 2 of the chosen items are defective is

Probability of defective item =	10	= 0.1
	100

Probability of not defective item = 1 – 0.1 = 0.9
So, probability that exactly 2 of the chosen items are defective
= ¹⁰C₂ (0.1)² (0.9)⁸ = 0.1937.