Multiple choice

\text{The average of five numbers is 51.4. The average of first and second number is 30.5. The average of fourth and fifth number is 62. What is the third number?}

  1. 72

  2. 75

  3. 77

  4. 78

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sum of five numbers = 5 × 51.4 = 257. Sum of first and second = 2 × 30.5 = 61. Sum of fourth and fifth = 2 × 62 = 124. Third number = Total - (Sum of 1st & 2nd) - (Sum of 4th & 5th) = 257 - 61 - 124 = 72. Option A is correct.

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