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The average of 25 results is 20. The average of first 12 results is 15 and that of the last 12 results is 18. Then, the 13th result is :
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- 100
- 101
- 104
- 103
- 100
Correct Option: C
Here , The average of 25 results = 20.
The average of first 12 results = 15
and average of the last 12 results = 18.
Value of 13th result = 25 × 20 – 12 × 15 – 12 × 18
Value of 13th result = 500 – 180 – 216
Hence , Value of 13th result = 104
