Probability with computer manufacturer

Question

A personal computer manufacturer buys 38% of its chips from Japan and the rest from the United States. Of the Japanese chips, 1.8% are defective, and 1.1% of the American chips are defective.

Find the probability that a chip is defective. (Round your answer to four decimal places.)

Answer 1

First we need to find what percent of chips are defective from Japan

0.38(0.018)

second we need to find what percent of chips are defective from America

(Since 38 percent of chips are made in Japan then the remaining 62 percent are made in the USA)

0.62(0.011)

Add both probabilities together to get the total probability that the chips are defective

0.38(0.018)+0.62(0.011)=0.0136

or 1.36 percent of chips manufactured are defective.