Average Problem

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svijay800: Newbie | Next Rank: 10 Posts; Posts: 7; Joined: Wed Dec 19, 2007 11:02 pm; Location: Chennai, Tamil Nadu, INDIA

Average Problem

by svijay800 » Thu Dec 20, 2007 2:52 am

At a certain high school, the respective weights for the following subjects are Mathematics 3, English 3, History 2, Science 2 and Art 1. What is a student’s average whose marks were the following: Geometry 89, American Literature 92, American History 94, Biology 81, and Sculpture 85?

Choices:
85.7
87.8
88.9
89.4
90.2

How do I have to approach the above problem/explanation?

Thanks in advance,

S Vijay

Quote

Source: Beat The GMAT — Problem Solving | Thu Dec 20, 2007 2:52 am

hudsn: Senior | Next Rank: 100 Posts; Posts: 49; Joined: Sat Sep 08, 2007 9:18 pm; Thanked: 1 times

by hudsn » Thu Dec 20, 2007 4:33 am

I think this is an average problem
Each subject has a different weight i.e. math grade * 3 + eng * 3 + hisotry * 2 + sci * 2 + art = total of 11
Math Grade = 89 = 89 * 3
English Grade = 92 = 92 * 3
History Grade 94 = 94 * 2
Science Grade = 81 = 81 * 2
Art Grade = 85 = 85 *1
Total the sum / 11
I believe it is a total of 978 / 11 = 88.9

Quote

preciousrain7: Senior | Next Rank: 100 Posts; Posts: 78; Joined: Thu Dec 06, 2007 4:16 pm; Location: NYC, NY; Thanked: 2 times

Re: Average Problem

by preciousrain7 » Sat Dec 22, 2007 3:39 pm

svijay800 wrote:At a certain high school, the respective weights for the following subjects are Mathematics 3, English 3, History 2, Science 2 and Art 1. What is a student’s average whose marks were the following: Geometry 89, American Literature 92, American History 94, Biology 81, and Sculpture 85?

Choices:
85.7
87.8
88.9
89.4
90.2

How do I have to approach the above problem/explanation?

Thanks in advance,

S Vijay

Vijay, what's the OA? Thanks!