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Mathematics of Investment Questionnaire

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 John has $20,000 to invest. He invests part of his money at an annual interest rate of 6%, the rest at 9% annual rate. The return on these two investments over one year is $1,440. How much does he invest at each rate? Solution  Paul made two investments totaling $15,000. The percentage return on the first investment was 7% annually, while the the percentage return on the second one was 10% annually. If the total return on the two investments over one year was $1,350, how much was invested at each rate?  Ben invested $30,000, part of which at 5% annual interest rate, the rest at 9% annual interest rate. The interest earned from the investments was $2,100 at the end of one year. How much did he invest at each rate? …show more content…

10. Ben invests 30% of his total funds at 5% annual rate, 40% at 6% annual rate, the rest at 8% annual rate. If his total income for one year is $560, how much does he invest at each rate? 11.  Ben invests 30% of his total funds at 5% annual rate, the rest at 8% annual rate. If his total income for one year is $639, how much does he invest at each rate? Solution 12.  Ben invests 30% of his total funds at 5% annual rate, 40% at 6% annual rate, the rest at 8% annual rate. If his total income for one year is $630, how much does he invest at each rate? Solution 13.  A certain amount of money is to be invested for a period of one year. The amount of money invested at 6% per year is twice as much as the amount invested at 9% per year. If the income for one year is $1680, how much is invested at each rate? Solution 14.  Jeff has some money to invest for one year. The amount of money invested at 5% per year is $5,000 more than that invested at 8% per year. The interest earned is $1,160. How much does he invest at each rate? Solution 15.  One third of the funds is invested at an annual interest rate of 4%, the rest at 6% annual rate. If the income for one year is $480, how much is invested at each rate? 16.  The ratio of the the amount of money invested at 6% annual rate to the amount invested at 9% is 2 : 5. If the total income for one year

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