Prephub - At a math contest 57 students are wearing blue shirts and another 75 students are wearing yellow shirts The 132 students are assigned into 66 pairs In exactly 23 of these pairs both students are wearing blue shirts In how many pairs are both students wearing yellow shirts

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MCQ

At a math contest, $57$ students are wearing blue shirts, and another $75$ students are wearing yellow shirts. The $132$ students are assigned into $66$ pairs. In exactly $23$ of these pairs, both students are wearing blue shirts.
In how many pairs are both students wearing yellow shirts?

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