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A $5 discount coupon is given to N riders. The probability of using a coupon is P. What is the expected cost for the company?

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In this mock interview, Marcus (Data Scientist, DeliveryHero) answers the question, "A $5 discount coupon is given to N riders. The probability of using a coupon is P. What is the expected cost for the company?"

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A discount coupon is given to N riders. The probability of using a coupon is P. What is the probability that one of the coupons will be used?

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