Question
At a school swimming event, 34 of the pupils were girls. Given that that 34 of the boys and 56 of the girls did not know how to swim, how many pupils were there altogether if there were 144 swimmers at the event?
4 m

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At a school swimming event, 34 of the pupils were girls. Given that that 34 of the boys and 56 of the girls did not know how to swim, how many pupils were there altogether if there were 144 swimmers at the event?