(Answered) Every day your friend commutes to school on the subway at 9

Engineering

Every day your friend commutes to school on the subway at 9 AM. If the subway is on time, she will stop for a $3 coffee on the way to class. If the subway is delayed she skips the coffee and goes straight to class. The probability that the subway is delayed is 40%. Find the probabilities that she spends, 0, 3, 6, 9, 12, and 15 dollars on coffee over the course of a five day week.

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