Asked by Anonymous
Connie, Ken and Dan took a Mathematics test. Connie scored 3 marks above their average score. Ken scored 14 marks fewer than Connie. Find the difference between Dan’s marks and Ken’s marks.
Answers
Answered by
oobleck
if the average is x, then
c+k+d = 3x
c = x+3
k = c-14 = x-11
that means that
(x+3) + (x-11) + d = 3x
d = x+8
thus, d-k = (x+8)-(x-11) = 19
c+k+d = 3x
c = x+3
k = c-14 = x-11
that means that
(x+3) + (x-11) + d = 3x
d = x+8
thus, d-k = (x+8)-(x-11) = 19
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