Sriram was conducting an experiment in which the average of 11 observations came to be 92, while the average of first five observations was 89, and that of the last five was 86. What was the measure of the 6th observation ?
Solution
Correct Answer: Option B
This can be done as,
(11 × 92) - (5 × 89) - (5 × 86)
= 1012- 445 - 430 = 137
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