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Railways PYQCBT 1 2016

RRB NTPC · Question 87

Calculate: 5/7 + 21/31 + 52/33

  1. 21350/7161

  2. 21250/7161

  3. 23250/7161

  4. 21240/7161

Show answer & explanation

Answer: (B) 21250/7161

Explanation

LCD = 7 × 31 × 33 = 7161. 5/7 = 5115/7161, 21/31 = 4851/7161 and 52/33 = 11284/7161. Sum = 21250/7161.