Question

moussa recorded the grade level and instrument of everyone in the middle school school of rock below, school of rock guitar bass drums keyboard 6th grade 10 17 13 16 7th grade 11 18 20 16 8th grade 14 12 17 20 what percent of the students in the school of rock play bass? round your answer to the nearest tenth of a percent.

Explanation:

Step1: Calculate total number of students

Add all the values in the table.
$$10 + 17+13 + 16+11+18+20+16+14+12+17+20$$
$$=(10 + 11+14)+(17+18+12)+(13+20+17)+(16+16+20)$$
$$=35+47+50+52$$
$$=184$$

Step2: Calculate number of bass - playing students

Add the values in the bass column: $17 + 18+12=47$

Step3: Calculate the percentage

Use the formula $\text{Percentage}=\frac{\text{Number of bass - playing students}}{\text{Total number of students}}\times100\%$
$\text{Percentage}=\frac{47}{184}\times100\%$
$47\div184\approx0.255435$
$0.255435\times100\% = 25.5435\%$

Answer:

$25.5\%$