SOLUTION: could u please help me solving this?
on a geography quiz, emily and katherine scored an average of 80 points. if katherine and julia scored an average of 85 points how many more
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on a geography quiz, emily and katherine scored an average of 80 points. if katherine and julia scored an average of 85 points how many more
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Question 789830: could u please help me solving this?
on a geography quiz, emily and katherine scored an average of 80 points. if katherine and julia scored an average of 85 points how many more points did juila earn than emily?
a)15
b)10
c)7.5
d)5
e)2.5 Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! on a geography quiz, emily and katherine scored an average of 80 points. if katherine and julia scored an average of 85 points how many more points did juila earn than emily?
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let k=what Katherine scored
let e=what Emily scored
let j=what Julia scored
..
(k+e)/2=80
(k+j)/2=85
..
k+j=170
k+e=160
subtract:
j-e=10
points juila earn more than emily=10 (ans b)
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