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School OL ROC below
School of Rock
Guitar Bass Drums Keyboard Total
6th grade 13 10 17
20
60
7th Grade
14
17
11
10
8th Grade
18
12
17
16
63
Total
45
51
42
175
What percent of the 7th graders in the School of Rock play keyboard? Round your
answer to the nearest whole number percent,
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Respuesta :

Using the percentage concept, it is found that 19% of the 7th graders in the School of Rock play keyboard.

The percentage of an amount a relative to another amount b is given by:

[tex]P = 100\frac{a}{b}[/tex]

From the table given:

  • There are 14 + 17 + 11 + 10 = 52 7th graders, hence, [tex]b = 52[/tex]
  • Of those, 10 play the keyboard, hence [tex]a = 10[/tex]

Then

[tex]P = 100\frac{a}{b} = 100\frac{10}{52} = 19[/tex]

19% of the 7th graders in the School of Rock play keyboard.

A similar problem is given at https://brainly.com/question/10491646

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