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skelet666 [1.2K]
3 years ago
6

Maricopa's Success scholarship fund receives a gift of $ 115000. The money is invested in stocks, bonds, and CDs. CDs pay 5.75 %

interest, bonds pay 5.8 % interest, and stocks pay 6.4 % interest. Maricopa Success invests $ 30000 more in bonds than in CDs. If the annual income from the investments is $ 6930 , how much was invested in each account?
Mathematics
1 answer:
Damm [24]3 years ago
6 0

Answer:

Amount invested in CDs is <em>$20000</em>.

Amount invested in Bonds is <em>$50000</em>.

Amount invested in Stocks is <em>$45000</em>.

Step-by-step explanation:

Let amount invested in CDs be $x.

Interest received from CDs is 5.75 \%

\Rightarrow \text{Interest from CDs} = x \times \dfrac{5.75}{100}   ...... (1)

As per question, amount invested in bonds is $(x+30000).

Interest received from bonds is 5.8 \%.

\Rightarrow \text{Interest from bonds} = (x+30000) \times \dfrac{5.8}{100}   ...... (2)

Total amount is $115000.

So, amount invested in stocks = Total amount - Amount invested in CDs and Bonds

\Rightarrow 115000 - x - (x+30000)\\ \Rightarrow (85000-2x)

Interest received from stocks is 6.4 \% \Rightarrow \text{Interest from Stocks} = (85000-2x) \times \dfrac{6.4}{100}   ...... (3)

Total annual income from interest is <em>$6930</em>.

Adding equations (1), (2) and (3) and putting it equal to 6930.

\Rightarrow x \times \dfrac{5.75}{100} + (x+30000) \times \dfrac{5.8}{100} + (85000-2x) \times \dfrac{6.4}{100} = 6930\\\Rightarrow (12.8x - 11.55x) = 544000 + 174000 - 693000\\\Rightarrow 1.25x = 25000\\\Rightarrow x = 20000

Amount invested in CDs is <em>$20000</em>.

Amount invested in Bonds is (x + 30000)= $20000+$30000 = <em>$50000</em>.

Amount invested in Stocks is \(85000 - 2 \times x\) = \(85000 - 2 \times 20000\)= <em>$45000</em>.

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