To find the probability that an eighth grader chosen at random will play the drums, we first need to find the total number of eighth grade students who play an instrument.
Total eighth grade students playing an instrument = 4 (guitar) + 13 (bass) + 13 (drums) + 5 (keyboard) = 35
Then, we find the number of eighth grade students who play the drums.
Number of eighth grade students playing drums = 13
Therefore, the probability that an eighth grader chosen at random will play the drums is:
13 (number of eighth grade students playing drums) / 35 (total eighth grade students playing an instrument) = 13/35
So, the probability that an eighth grader chosen at random will play the drums as a fraction in simplest form is 13/35.
Xin recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students
Instrument # of Students
Guitar 15
Bass 13
Drums 12
Keyboard 3
Eighth Grade Students
Instrument # of Students
Guitar 4
Bass 13
Drums 13
Keyboard 5
Based on these results, express the probability that an eighth grader chosen at random will play the drums as a fraction in simplest form.
1 answer