The average of 11 results is 59 and that of the first 10 is 58. The 11th result is?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 69.
Average of the 11 results = 11 × 59 = 649
Average of the 10 results = 10 × 58 = 580
Hence, the required 11th result = 649 - 580 = 69