Question 1175225
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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.