1. A grade 7 Math teacher asked his students to do a survey of social media platforms being used by the students. From 100 students surveyed, 88 use App X and 56 use App Y. Find out the number of students who use both App X and App Y if each of the students uses at least one of these two.
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100 students surveyed and 88 use app X and 56 use app Y
HOW?????
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