Mathematics

1 December, 00:06

A door-to-door salesman expects to make a sale 12% of the time when starting the day. But making a sale increases his enthusiasm so much that the probability of a sale to the next customer is 0.38. If he makes no sale, the probability for a sale to the next customer stays at 0.12. What is the probability that he will make at least two sales with his first three visits?

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