The average of 11 results is 60 marks. If the average of first six results in 59 marks and that of the last six is 62 marks, then the sixth result is:
Explanation:
Sum of all 11 results = 60 × 11 = 660
Sum of first 6 results = 6 × 59 = 354 Sum of first 6 results = 6 × 62 = 372
∴ 354 + 372 – 6th result = 660 ⇒ 6th result = 726 – 660 = 66
Hence, option (c).
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