Question 983296
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For given problem, there is no solution. $192000 invested at the highest rate (0.125 percent) would equal ($192000*0.00125=$240) only $240, not $12000.
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If the rates were 9.5% and 12.5%, the lowest rate would yield more than $12000
0.095($192000)=$18240
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Check your problem and re-post.