CÂU HỎI 3 (SINGLECHOICE)
L Đánh dấu
A student buys 1000 integrated circuits (ICs) from supplier A, 2000 ICs from supplier B and 3000 ICs from supplier C. He tested the ICs and found that the conditional
probability of an IC being defective depends on the supplier from it was bought. Specifically, given that an IC came from supplier A, the probability that it is defective is 0.05;
given that an IC came from supplier B, the probability that it is defective is 0.15; given that an IC came from supplier C, the probability that it is defective is 0.20. If ICs from
the three supplier are mixed together and one is selected at random, what is the probability that it is defective?
0.1583
None of the other choices is correct
0.08721
0.09167
0.06635
