Question 505177
Let x be the amount invested in each of the three accounts
Interest earned in account paying 7% interest I1 = 7x/100
Interest earned in account paying 8% interest I2 = 8x/100
Interest earned in account paying 10.5% interest I3 = 10.5x/100

Total Interest = 1249.50
I1 + I2 +I3 = 1249.50
7x/100 + 8x/100 + 10.5/100 = 1249.50

=> 7x + 8x + 10.5x = 124950
=>25.5x = 124950

x = 4900

Amount investeed in each of the account is $4900