Question
At a school swimming event, 12 of the students were girls. Given that that 27 of the boys and 57 of the girls did not know how to swim, how many students were there altogether if there were 161 swimmers at the event?
4 m

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At a school swimming event, 12 of the students were girls. Given that that 27 of the boys and 57 of the girls did not know how to swim, how many students were there altogether if there were 161 swimmers at the event?