Mathematics, 02.06.2021 03:10 kelli151

Of the 35 students in my class, 11 practice taekwondo, 11 play piano, and 20 take lessons at AoPS. 4 students play piano and go to AoPS, 3 students do taekwondo and play piano, 5 students
go to AoPS and practice taekwondo, and 3 students do none of these. How many students do all 3?

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Of the 35 students in my class, 11 practice taekwondo, 11 play piano, and 20 take lessons at AoPS....

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