From a survey of 200 persons, the numbers that subscribe to a certain monthly magazine were
observed as follows:
Sept. o

From a survey of 200 persons, the numbers that subscribe to a certain monthly magazine were
observed as follows:
Sept. only 36, Sept. but not Aug. 46
Sept. and July 16, Sept. 52, July 96, July and Aug. 16, None of the threes 48.
Using the set devices find,
(i) How many read Aug. issue?
(ii) How many read two successive issues ?
(iii) How many read the July issue, if and only if they did not read the Aug. issue ?​

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