Question
At a school swimming event, 13 of the students were boys. Given that that 12 of the girls and 35 of the boys did not know how to swim, how many students were there altogether if there were 154 swimmers at the event?
4 m

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At a school swimming event, 13 of the students were boys. Given that that 12 of the girls and 35 of the boys did not know how to swim, how many students were there altogether if there were 154 swimmers at the event?