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26-06-2016
Mathematics

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twelve students in a class average 70% on a certain test. eighteen others average 80%. what is the overall average of the thirty students as a percent

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meerkat18 meerkat18

03-07-2016

Given:
12 students average 70%
18 students average 80%

What is the overall average of the 30 students as a percent?

12 x 70% = 840%
18 x 80% = 1440%

840% + 1440% = 2280%

2280% / 30 = 76%

The overall average of the 30 students is 76%.

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