Three companies X Y and Z supply computers to a university...

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Three companies X, Y and Z supply computers to a university. The percentage of computers supplied by them and the probability of those being defective are tabulated below:

Company % of computer Probability of being supplied defective

X 60% 0.01

Y 30% 0.02

Z 10% 0.03

Given that a computer is defective, the probability that it was supplied by Y is

A. 0.1

B. 0.2

C. 0.3

D. 0.4

Answer: Option D

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Company	% of computer	Probability of being supplied defective
X	60%	0.01
Y	30%	0.02
Z	10%	0.03