You have X amount of 4% interest rate and Y amount of 8%. After consolidating these two deposits, the formula to find the new interest rate(r%) of the consolidated amounts is:
r= (4x+8y)/(x+y)
the problem indicates the new interest rate(r%) of the mix is 5%
substituting r with 5,we get:
5=(4x+8y)/(x+y)
5x+5y=4x+8y
x=3y
After you get the above equation, you just need to look at your options for an x that is 3 times of y.
Y=32 X=96
Hope my first post helps.
r= (4x+8y)/(x+y)
the problem indicates the new interest rate(r%) of the mix is 5%
substituting r with 5,we get:
5=(4x+8y)/(x+y)
5x+5y=4x+8y
x=3y
After you get the above equation, you just need to look at your options for an x that is 3 times of y.
Y=32 X=96
Hope my first post helps.
