Mathematics, 04.10.2021 06:50 25cotahai

Damian 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 4
Drums 11
Keyboard 5
Eighth Grade Students
Instrument # of Students
Guitar 5
Bass 3
Drums 8
Keyboard 11

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

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