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1. The interest for a principle of \(₹4500\) which gives an amount of \(₹5000\) at end of certain period is
2. Which among the following is the simple interest for the principle of \(₹1000\) for one year at the rate of \(10\%\) interest per annum?
3. Which among the following rate of interest yields an interest of \(₹200\) for the principle of \(₹2000\) for one year.