A sum of rs.4000 is lent out in two parts one at 8% simple interest and the other at 10% simple interest. if the average annual interest is 8.8%. find the sum lent at 8%
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8x/100 + 10(4000-x)/100 = 4000*8.8/100
8x /100 + 400- x/10 = 352
2x/100 = 48
x = 48×100/2
= 2400
therefore, the sum lent at 8% is 2400
8x /100 + 400- x/10 = 352
2x/100 = 48
x = 48×100/2
= 2400
therefore, the sum lent at 8% is 2400
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