Mathematics, 16.04.2021 01:00 mem8163

William recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students
Instrument# of Students
Guitar8
Bass8
Drums7
Keyboard2
Eighth Grade Students
Instrument# of Students
Guitar12
Bass2
Drums10
Keyboard5

Based on these results, express the probability that a seventh grader chosen at random will play an instrument other than guitar as a decimal to the nearest hundredth.

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