A poll was taken of the leisure time activities of 90 students. ... 60 students watch TV (T), 60 students read (R), 70 students go to the cinema (C). 26 students watch TV, read and go to the cinema. 20 students watch TV and go to the cinema only. 18 students read and go to the cinema only. 10 students read and watch TV only. a) Calculate how many students only watch TV b) Calculate how many students only go to the cinema

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