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?