In a school of 450 students, 110 of them are in the choir, 240 of them are in the band and 60 students are in the choir and the band. Please help I've been trying to solve this for an hour (T-T)

In a school of 450 students, 110 of them are in the choir, 240 of them are in the band and 60 students are in the choir and the band.

Please help I've been trying to solve this for an hour (T-T)

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In a school of 450 students, 110 of them are in the choir, 240 of them are in the band and 60 students are in the choir and the band. Please help I've been trying to solve …

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