1998 Gauss (7) #4
Source:
February 25, 2017
Gauss
Problem Statement
Jean writes five tests and achieves the marks shown on the
graph. What is her average mark on these five tests?
[asy]
draw(origin -- (0, 10.1));
for(int i = 0; i < 11; ++i) {
draw((0, i) -- (10.5, i));
label(string(10*i), (0, i), W);
}
filldraw((1, 0) -- (1, 8) -- (2, 8) -- (2, 0) -- cycle, black);
filldraw((3, 0) -- (3, 7) -- (4, 7) -- (4, 0) -- cycle, black);
filldraw((5, 0) -- (5, 6) -- (6, 6) -- (6, 0) -- cycle, black);
filldraw((7, 0) -- (7, 9) -- (8, 9) -- (8, 0) -- cycle, black);
filldraw((9, 0) -- (9, 8) -- (10, 8) -- (10, 0) -- cycle, black);
label("Test Marks", (5, 0), S);
label(rotate(90)*"Marks out of 100", (-2, 5), W);
[/asy]