The total number of eighth grade students is 7 + 13 + 8 + 12 = 40.
The number of eighth grade students who play the drums is 8.
Therefore, the probability that an eighth grader chosen at random will play the drums is 8/40 = 0.2.
Converting 0.2 to a percentage gives 20%.
So, the probability that an eighth grader chosen at random will play the drums is 20%.
Zendaya recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students
Instrument
# of Students
Guitar
7
Bass
15
Drums
12
Keyboard
6
Eighth Grade Students
Instrument
# of Students
Guitar
7
Bass
13
Drums
8
Keyboard
12
Based on these results, express the probability that an eighth grader chosen at random will play the drums as a percent to the nearest whole number.
1 answer
1 answer