...exactly two men. Twelve men at? "At a party each man danced with exactly three women and each woman danced with exactly two men. Twelve men attended the party. How many woman attended the party?"
...exactly two men. Twelve men at? "At a party each man danced with exactly three women and each woman danced with exactly two men. Twelve men attended the party. How many woman attended the party?"
18
There were 36 men-women dance pairs. If each woman danced with exactly two men then there must have been 18 women to 'use up' all pairings.
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