(Answered) The following question needs answering please help make

Statistics

The following question needs answering. Please help. Make sure to include a tree diagram.

Two factories manufacture computer memory chips. Suppose that 20% of the chips from Factory I are defective and that 5% of the chips from Factory II are defective. Each week Factory I produces four times as many chips as Factory II. It is important to use a tree diagram.

(a) What is the probability that a randomly selected chip is satisfactory?

(b) What is the probability that a randomly selected chip is defective?

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