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Aptitude day 201

Problems to solve:

1. If the annual rate of S.I increases from 5% to 7(1/2)%, a man’s yearly income increases by 750. His principal is:

2. A person invested an amount of 25,000 divided into 2 different schemes A and B at the simple interest rate of 3% p.a. and 8% p.a. respectively. If the total amount of simple interest earned in 3 years be 5000, what was the amount invested in scheme B? 

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