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A company makes cell phones at two different manufacturing plants. Seventy percent of its cell phones are

manufactured in Indonesia, and the remaining 30 % are manufactured in Vietnam. Of the cell phones manufactured in Indonesia, 4% have manufacturing defects, while of the cell phones that are manufactured in Vietnam, 6% have defects

. a. Draw a probability tree that diagrams this situation.

b. What percent of all the company's cell phones have manufacturing defects?

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