Question

The average of 27 results is 72. If the average of first 14 results is 69 and the average of the last 14 results is 76, then what will be the value of the 14th result?
1. 86
2. 34
3. 88
4. 30
5. 55

Answer 1

Correct Answer - Option 1 : 86

Given:

Average of 27 results = 72

Average of first 14 = 69 

Average of last 14 = 76

Formula used:

Average = sum of observations/total number of observations

Calculation:

Sum of 27 results = 27 × 72 = 1944

Sum of first 14 results = 14 × 69 = 966

Sum of last 14 results = 14 × 76 = 1064

∴ 14th result = 966 + 1064 - 1944 = 86

∴ The answer is 86