Jocelyn recorded the grade-level and instrument of everyone in the middle school
School of Rock below.
Seventh Grade Students
Eighth Grade Students
Instrument # of Students
Instrument # of Students
Guitar
12
Guitar
11
Bass
3
Bass
7
Drums
10
Drums
13
Keyboard
14
Keyboard
2
Based on these results, express the probability that a student chosen at random will
play an instrument other than drums as a fraction in simplest form.