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At Tacoma High each student must be enrolled in at least one of three musical groups: the Jazz Band, the Choir and the Symphonic. Each one of these groups is formed by exactly 150 students. No student belongs to only the Jazz band and the Choir.

If there are 25 students that belong to all 3 musical groups, 40 that are enrolled in the Symphonic and the Choir, and 70 that belong to the Jazz Band and the Symphonic, what percent of the students at Tacoma high belong to only one musical group?

### Select one of the following: