Question 1175225: a sum of $2800 is invested, partly at 5% and partly at 4%. if the total interest is $1280 per annum, find the amount of each investment.
Answer by ikleyn(52879)   (Show Source):
You can put this solution on YOUR website! .
a sum of $2800 is invested, partly at 5% and partly at 4%. if the total interest is $1280 per annum, find the amount of each investment.
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As the problem is posed, IT IS INCORRECT and has no solution.
Notice that even 5% of the total amount of 2800 dollars, 0.05*2800 = 5*28 = 140 dollars is L E S S than $1280.
Thus the problem is a FAKE.
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