Question

Natalie recorded the grade level and instrument of everyone in the middle school School of Rock below.
School of Rock
Grade Guitar Bass Drums Keyboard
6th grade 11 11 20 14
7th Grade 14 11 15 18
8th Grade 15 15 15 16

What percent of the 7th graders in the School of Rock play bass? Round your answer to the nearest whole number percent.

Answer 1

To find the percentage of 7th graders who play bass, we need to determine the total number of 7th graders and how many of them play bass.

From the table, the number of 7th graders playing bass is given as:
- Bass (7th Grade): 11

Next, we need to find the total number of 7th graders. We add up the number of students playing each instrument in the 7th grade:

- Guitar: 14
- Bass: 11
- Drums: 15
- Keyboard: 18

Total number of 7th graders:
\[
14 + 11 + 15 + 18 = 58
\]

Now, to find the percentage of 7th graders who play bass, we use the formula for percentage:
\[
\text{Percentage} = \left( \frac{\text{Number of students playing bass}}{\text{Total number of 7th graders}} \right) \times 100
\]

Plugging in the numbers:
\[
\text{Percentage} = \left( \frac{11}{58} \right) \times 100
\]

Calculating this gives:
\[
\text{Percentage} \approx 18.9655
\]

Rounding to the nearest whole number, the percentage of 7th graders who play bass is:
\[
\boxed{19}
\]