Current location - Training Enrollment Network - Mathematics courses - Class 52 held a five-point math test. The average score of boys is 4, that of girls is 3.25, and that of the whole class is 3.6. Boys 2 1, how many girls?
Class 52 held a five-point math test. The average score of boys is 4, that of girls is 3.25, and that of the whole class is 3.6. Boys 2 1, how many girls?
Set x girl

4 * 2 1+3.25 * X = 3.6 *(2 1+X)

84+3.25 times = 75.6+3.6 times

0.35 times =8.4

X=24

There are 24 girls.

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