2008 AMC 8 Problems/Problem 8

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Problem

Candy sales from the Boosters Club from January through April are shown. What were the average sales per month in dollars?

draw((0,0)--(36,0)--(36,24)--(0,24)--cycle);
draw((0,4)--(36,4));
draw((0,8)--(36,8));
draw((0,12)--(36,12));
draw((0,16)--(36,16));
draw((0,20)--(36,20));
fill((4,0)--(8,0)--(8,20)--(4,20)--cycle, black);
fill((12,0)--(16,0)--(16,12)--(12,12)--cycle, black);
fill((20,0)--(24,0)--(24,8)--(20,8)--cycle, black);
fill((28,0)--(32,0)--(32,24)--(28,24)--cycle, black);
label("$120", (0,24), W);
label("$80", (0,16), W);
label("$40", (0,8), W);
label("Jan", (6,0), S);
label("Feb", (14,0), S);
label("Mar", (22,0), S);
label("Apr", (30,0), S);
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$\textbf{(A)}\ 60\qquad\textbf{(B)}\ 70\qquad\textbf{(C)}\ 75\qquad\textbf{(D)}\ 80\qquad\textbf{(E)}\ 85$

Solution

There are a total of $100+60+40+120=320$ dollars of sales spread through $4$ months, for an average of $320/4 = \boxed{\textbf{(D)}\ 80}$.

See Also

2008 AMC 8 (ProblemsAnswer KeyResources)
Preceded by
Problem 7
Followed by
Problem 9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
All AJHSME/AMC 8 Problems and Solutions

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