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Assume an office has two telephones (A and B) with separate lines and different telephone numbers. The probability that telephone A rings when the office is closed is .30. The probability that telephone B rings when the office is closed is .20.

What is the probability that both telephones ring when the office is closed?
9 years ago

Answers

Both is an "and"

Multiply the two probabilities

.3 times .2
9 years ago

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