A salesman has a 60% chance of making a sale to each customer. The behaviour of successive customers is independent. If two customers A or B enteres the shop, what is the probablity that the salesman will make a sale to A or B?

The salesman has 60% of making a sale to A or B

) two shooters shoot the target. The probability that the first shooter hits the target in a single shot is 0.7 and the probability that the second shooter hits the target in a single shot is 0.5 the shooters shoot 20 times simultaneously to a target. What is the most probable number of times that at least one of shots hits the target?

thanks a lot for answer :)

) What is the most probable number of times that at least one of shots hits the target?.

Please clarify your question. Are you asking what is the most probable number of times that each shooter will hit the target given that each takes 20 shots?