SOLUTION: Mummy invested a total of $25000 in stocks, bonds and mutual fund. in one year, she earned 8% on her stocks investment, 10% on her bonds investment and 6% on her mutual fund invest

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Question 1101819: Mummy invested a total of $25000 in stocks, bonds and mutual fund. in one year, she earned 8% on her stocks investment, 10% on her bonds investment and 6% on her mutual fund investment, with a total of $1860. unfortunately, the amount she invested in the mutual fund was twice as large as the amount she invested in the bonds. how much did she invest in each?
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
s+b+m=25000
.08s+.10*b+.06m=1860
m=2b
s+b+2b=25000
s+3b=25000
.08s+.10*b+.06*2b=1860
.08s+.22b=1860
s+3b=25000
Solved by pluggable solver: Linear System solver (using determinant)
Solve:


Any system of equations:


has solution

or



(s=4000, b=7000}

m=2b
m=14000
check
4000+7000+14000=25000
ok
check
.08s+.10*b+.06m=1860
.08 *4000+.10*7000+.06*14000=1860
320+700+840=1860
1860=1860
ok
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