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Question:

Blair’s average (arithmetic mean) on two physics tests is 7. What should Blair’s score be on the next test to have an overall average of 8 for all the tests?

A 10
explanation

The arithmetic mean is defined as the sum of the terms divided by the number of terms. To have an overall average of 8, \([ \frac{\mathrm{7 \times 2+x} }{\mathrm{3} } = 8 ] \) then x=10.

Comments

J

3 weeks ago

I don't feel like it gives enough elaborate information on the answer

Eightball330

3 years ago

Downloaded this app to improve my asvab score , and app actually gives me in detail how to solve and find the answer to the problems for math. Amazing.

U.S Terminator

3 years ago

It’s a good app

ckaigsyosyo

3 years ago

Great I gotta make a 50 or higher

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