Mathematics, 05.02.2021 04:40, santos200154

Ruby recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students
Instrument # of Students
Guitar 13
Bass 14
Drums 11
Keyboard 15
Eighth Grade Students
Instrument # of Students
Guitar 6
Bass 7
Drums 14
Keyboard 8

Based on these results, express the probability that a seventh grader chosen at random will play an instrument other than drums as a fraction in simplest form.

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Ruby recorded the grade-level and instrument of everyone in the middle school School of Rock below....