Mathematics, 21.06.2021 01:00, eaves001

A number of students prepared for an examination. Arts, Religion and sculpture. Out of this number, 15 took arts, 20 took religion and 23 took sculpture, 9 took both religion and sculpture, 6 took both arts and sculpture and all those who took arts also took religion. One student fell ill and failed to write any of the papers. How many students took exactly one of the examination papers?

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