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InterviewSolution
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The mean of 11 numbers is 35. If the mean of first 6 numbers is 32 and that of last 6 numbers is 37, find the 6th number. |
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Answer» Let the 6th number be x Given that mean of 11 results = 35 ∴ sum of 11 numbers = 11 × 35 = 385 Mean of the first 6 results = 32 Sum of first 6 numbers = 6 × 32 = 192 Mean of the last 6 results = 37 Sum of the last 6 results = 6 × 37 = 222 Therefore, Sum of first 6 numbers + sum of last 6 numbers – 6th number = sum of 11 numbers 192 + 222 - x = 385 ⇒ 414 – x = 385 ⇒ x = 29 |
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