Ernie deposited $4000 between two savings accounts. One account paid 4% simple interest and the other paid 2%. At the end of one year, Ernie had earned $140 in interest for both accounts. How much money did Ernie deposit in the account that paid 4% interest?
A)$2000
B)$2500
C)$2800
D)$3000

Verified Answer :

Ernie deposited D.) 3000 to the account that paid 4% interest

Simple interest is computed by multiplying the principal to its rate and term.

SI = P r t

Since there are two accounts and two interest rates, I did a trial and error computation. It may be tedious but it gives the correct answer.


Account 1     Interest 4%     Account 2    Interest 2%    Total Interest 


  
4,000.00

           160.00                 -  
              -  
                  160.00



  
3,000.00

          120.00
        1,000.00
        20.00
                  140.00



  
2,000.00

            80.00
        2,000.00
        40.00
                  120.00



  
1,000.00

           40.00
         3,000.00
        60.00
                  100.00



          
    0                     0                4,000.00
        80.00

80.00


Answer:

D) $3000

Step-by-step explanation: