Question 702772
let church invested x at 3% & 4x at 2.75% & the total interest is 2800
so 3x/100+2.75*4x/100=2800
or 3x+11x=2800*100=280000
or 14x=280000
or x=20000
so the amount invested 20000 at 3% & 800000 at 2.75%
ans