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Railways PYQCBT 1 2020

RRB NTPC · Question 63

A man invested 1/2 of his capital at 5% rate of interest per annum, 1/3 of his capital at 8% per annum and the remaining at 10% rate of interest per annum. His total income from the three investments is Rs. 820.00 in a year. The total capital invested is:

  1. Rs. 16000

  2. Rs. 12000

  3. Rs. 6400

  4. Rs. 8000

Show answer & explanation

Answer: (B) Rs. 12000

Explanation

Income = C/2 × 5% + C/3 × 8% + C/6 × 10% = C(0.025 + 0.0267 + 0.0167) = 0.0683C = 820. So C = Rs 12,000.