Multiple choice

The average of five numbers is 204.4. The average of first two of them is 321 and average of the last two numbers is 114.5. Which is the third number ?

  1. 161

  2. 163

  3. 149

  4. 151

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sum of five numbers = 5 × 204.4 = 1022. Sum of first two = 2 × 321 = 642. Sum of last two = 2 × 114.5 = 229. Third number = Total - (first two + last two) = 1022 - 642 - 229 = 151. Option D is correct.