Rs. 1500 invested in two parts. On 1st part rate of interest was 6% and on 2nd part rate of interest was 5% therefore at the end of the year Rs. 85 received as interest. Find the sum invested at 5%.

Rs. 400 Rs. 600 Rs. 500 Rs. 550

Rs. 500

Total rate of interest for which ₨. 85 is received = \(\frac{85}{1500}\) x100% = \(\frac{17}{3}\)% Now using allegation method: