The management of a hotel conducted a survey. It found that of the 2560 guests who were surveyed, 1785 tip the wait staff. 1219 tip the luggage handlers. 831 tip the maids. 275 tip the maids and the luggage handlers. 700 tip the wait staff and the maids. 755 tip the wait staff and the luggage handlers. 245 tip all three services. 210 do not tip these services. How many of the surveyed guests tip a. exactly two of the three services? b. only the wait staff? c. only one of the three services?

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