The average of 11 results is 50. If the average of the first six results is 49 and that of the last six is 52, the sixth no. is
Options:
A . 50
B . 56
C . 52
D . 48
Answer: Option B Answer: (b) Using Rule 1, Average of two or more numbers/quantities is called the mean of these numbers, which is given by $\text"Average(A)" = \text"Sum of observation / quantities"/\text"No of observation / quantities"$ ∴ S = A × n Sixth result = 6 × 49 + 6 × 52 – 11 × 50 = 294 + 312 – 550 = 56
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