To find the probability that an eighth grader chosen at random will play the drums, we first need to calculate the total number of eighth-grade students who play an instrument:
Total eighth grade students = Total number of eighth grade guitar players + Total number of eighth grade bass players + Total number of eighth grade drums players + Total number of eighth grade keyboard players
Total eighth grade students = 4 + 15 + 12 + 14
Total eighth grade students = 45
Next, we calculate the probability of choosing an eighth grader who plays the drums:
Probability = Number of eighth grade drum players / Total eighth grade students
Probability = 12 / 45
Probability = 0.27
Therefore, the probability of choosing an eighth grader who plays the drums is 0.27 when expressed as a decimal to the nearest hundredth.
Latanya recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students
Instrument # of Students
Guitar 14
Bass 9
Drums 2
Keyboard 9
Eighth Grade Students
Instrument # of Students
Guitar 4
Bass 15
Drums 12
Keyboard 14
Based on these results, express the probability that an eighth grader chosen at random will play the drums as a decimal to the nearest hundredth.
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1 answer