Justin recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students
Instrument # of Students
Guitar 11
Bass 5
Drums 14
Keyboard 13
Eighth Grade Students
Instrument # of Students
Guitar 4
Bass 8
Drums 7
Keyboard 8
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.
