Colton recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students:
Guitar: 12
Bass: 14
Drums: 5
Keyboard: 4
Eighth Grade Students
Guitar: 9
Bass: 10
Drums: 3
Keyboard: 6
Based on these results, express the probability that a student chosen at random will play the bass as a fraction in simplest form.
There are a total of 14 + 10 = 24 students who play the bass.
The total number of students is 12 + 14 + 5 + 4 + 9 + 10 + 3 + 6 = 63.
Therefore, the probability of choosing a student who plays the bass at random is:
24/63
This can be simplified to:
8/21
So the probability of a student chosen at random playing the bass is 8/21.