Multiple choice

The average of 9 results is 50. If the average of first 5 results is 49 and last 5 results is 52, find the 5th result.

  1. 45

  2. 46

  3. 56

  4. 55

  5. None of these

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

The total of 9 results = 9 x 50 = 450 The total of first 5 results = 5 x 49 = 245 The total of last 5 results = 5 x 52 = 260 The 5th result is common to both; 5th result = 245 + 260 - 450 = 55.