The diagram gives the percentage of a town's adults who read papers X, Y and Z; the number outside reads none. If 1800 adults read no paper, how many read at least two of the papers?

Question

Accepted Answer

2200. None is 18%, so 18% 1800 and the town has 10000 adults. At least two = 8 + 6 + 5 + 3 = 22\%, i.e. 2200. 1900 forgets the 3% in the centre, 10000 is all the adults, and 2800 counts the centre once for each pair.

The diagram gives the percentage of a town's adults who read papers X, Y and Z; the number outside reads none. If 1800 adults read no paper, how many read at least two of the papers?

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