The following information was observed during a survey of 100 TV viewers, 18 watch
programme P only, 23 watch programme P but not Q, 8 watch programme P and R, 26 watch
programme P, 48 watch programme R, 8 watch programme Q and R, 14 watch none of these
programmes. Find the number of of people who watch (i) exactly 2 programmes, (ii) Only one
programme,
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