KAMOO3X
14.10.2020 •
Mathematics
Eight students in a small class made the test scores shown in the table. What was the mean absolute deviation for the class?
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Ответ:
Ответ:
x + y = 21 and then
5x + 2y = 66
Multiply the top equation by two and subtract from the bottom one...
5x + 2y = 66
-(2x + 2y = 42)
and we get
3x = 24
x = 8
y = 21-x = 13