Respuesta :
Answer:
$3500
Step-by-step explanation:
Given: A total of $10,000 is invested in two funds, Fund A and Fund B. Fund A pays 5% annual interest and Fund B pays 7% annual interest. The combined annual interest is $630.
To Find: How much of the $10,000 is invested in Fund A
Solution:
Total amount invested [tex]=\$ 10000[/tex]
Let the amount invested in Fund A [tex]=\text{x}[/tex]
The Amount invested in Fund B [tex]=\$ 10000-\text{x}[/tex]
We know that
[tex]\text{interest}=\frac{\text{principal}\times \text{rate} \times \text{time}}{100}[/tex]
Annual interest accrued from Fund A [tex]=\frac{\text{x}\times5}{100}[/tex]
Annual interest accrued from Fund B [tex]=\frac{(10000-\text{x})\times7}{100}[/tex]
Combined annual interest accrued[tex]=\$ 630[/tex]
Combined annual interest accrued = Annual interest accrued from Fund A+ Annual interest accrued from Fund B
[tex]\frac{\text{x}\times5}{100}+\frac{(10000-\text{x})\times7}{100}[/tex] [tex]=\$ 630[/tex]
[tex]\frac{5\text{x}+70000-7\text{x}}{100}=630[/tex]
[tex]\frac{70000-2\text{x}}{100}=630[/tex]
[tex]2\text{x}=7000[/tex]
[tex]\text{x}=3500[/tex]
Amount invested in Fund A is [tex]\$ 3500[/tex]