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One eighth of the class graduated with an A average, 1/2 got a B, and the rest of the class had a C average. In a class of 800, how many had a c average

Respuesta :

choixongdong
1/8  of the class graduated with an A average
1/2= 4/8 got a B
the rest of the class had a C average = 3/8

In a class of 800

800/8 = 100

so 

1/8  of the class graduated with an A average = 100
1/2 got a B = 400
the rest of the class had a C average = 300

answer
300 had a C average.

Cetacea

The number of students who got average C is 300.

Given that one eighth of the class graduated with an A average, 1/2 got a B.

So total [tex]\frac{1}{8}+\frac{1}{2}=\frac{5}{8}[/tex] got A or B average.

Given that: the rest of the class had a C average.

That means: [tex]1-\frac{5}{8}=\frac{3}{8}[/tex] had a average C.

There are total 800 students.

So the number of students who got average C is = [tex]800\cdot\frac{3}{8}=300[/tex]

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