Could someone please help me how to calcute the anwers of these problems?
a) A group of 700 tourists are visiting a city and the following information is given:
379 visited the park
419 visited the museum
260 visited the theatre
102 went to the theatre but didnt go to the park nor the museum
92 went to the museum but didnt go to the park nor the theatre
110 went to the park but didnt go to the theatre
60 went to the three places
304 tourists went to only place and 287 went to two places. Calculate how these values are obtained.
b) A car agency sold 180 units during a year with the following characteristics:
57 were standard
77 had air conditioning (ac)
45 were standard and had ac
10 were standard but didnt have ac or stereo
28 were standard and had ac, but didnt have stereo
90 didnt have any of these three
19 had ac and stereo
22 units had stereo. Find out how this was obtained.