Avg. amt. of annual interest earned across 3 investment acct's was 2709. If 1 accn't yielded 1345 in a 12 month period, and 2nd yielded 568, what did 3rd accn't yield?

1 Answer | Add Yours

beckden's profile pic

beckden | High School Teacher | (Level 1) Educator

Posted on

First (A + B + C)/3 = 2709

so

(1345 + 568 + x)/3 = 2709

1345 + 568 + x = 3*2709

1913 + x = 8127

x = 8127 - 1913

x = 6214

Check - (1345 + 568 + 6214)/3 = 8127/3 = 2709

So the answer is 6214.

We’ve answered 333,778 questions. We can answer yours, too.

Ask a question