The total number of seventh grade students is 11 + 5 + 14 + 13 = 43.
The number of seventh grade students who play an instrument other than guitar is 5 + 14 + 13 = 32.
The probability that a seventh grader chosen at random will play an instrument other than guitar is 32/43 ≈ 0.74 (rounded to the nearest hundredth).
Therefore, the answer is 0.74.
Justin recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students:
Guitar: 11
Bass: 5
Drums: 14
Keyboard: 13
Eighth Grade Students:
Guitar: 4
Bass: 8
Drums: 7
Keyboard: 8
Based on these results, express the probability that a seventh grader chosen at random will play an instrument other than guitar as a decimal to the nearest hundredth.
1 answer
1 answer