Question
A group of students took part in a survey to vote for their favourite sport. Each pupil voted for only 1 type of sport: tennis, fencing or floorball. 34 of them voted for either tennis or fencing. 25 of them for either fencing or floorball. 18 of them voted for fencing. How many students took part in the survey?
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A group of students took part in a survey to vote for their favourite sport. Each pupil voted for only 1 type of sport: tennis, fencing or floorball. 34 of them voted for either tennis or fencing. 25 of them for either fencing or floorball. 18 of them voted for fencing. How many students took part in the survey?