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3 years ago

The school chorus has 52 students which represents 26% of the seventh graders. How many students are in the seventh grade

Mathematics

1 answer:

barxatty [35]3 years ago

8 0

Answer:

There are 200 students in the seventh grade.

Step-by-step explanation:

For equations like these, you have to use the is/of formula, which is:

Percent/100 = is/of.

Since you are trying to find how many students are in the seventh grade, this means that 52 <u><em>is</em></u> 26% of the total amount of students in the seventh grade. So, the formula would look like so:

26/100 = 52/n.

Next, you have to cross multiply, which means you would multiply 26 by n, and 52 by 100.

Then, you are going to have this left over from the cross multiplying:

5200 = 26n.

Divide 26 on both sides, leaving you with:

1n = 200, or n = 200.

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This means that the null hypothesis is:

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This means that the alternate hypothesis is:

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This means that $\mu = 0.05, \sigma = \sqrt{0.05*0.95}$

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