Difference between revisions of "2011 AMC 12A Problems/Problem 4"

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== Solution ==
 
== Solution ==
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88/7
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== See also ==
 
== See also ==
 
{{AMC12 box|year=2011|num-b=3|num-a=5|ab=A}}
 
{{AMC12 box|year=2011|num-b=3|num-a=5|ab=A}}

Revision as of 22:46, 9 February 2011

Problem

At an elementary school, the students in third grade, fourth grade, and fifth grade run an average of 12, 15, and 10 minutes per day, respectively. There are twice as many third graders as fourth graders, and twice as many fourth graders as fifth graders. What is the average number of minutes run per day by these students?

Solution

88/7

See also

2011 AMC 12A (ProblemsAnswer KeyResources)
Preceded by
Problem 3
Followed by
Problem 5
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 AMC 12 Problems and Solutions