Statistics
Mean
JEE Main 2020
Grade 11
Question:
The mean of the five observations $x$, $x + 2$, $x + 4$, $x + 6$, $x + 8$ is 11. The value of $x$ is:
Step-by-Step Solution
Key Concept: Add the five expressions, set the sum equal to $5 \times 11$ (since mean $\times$ number of observations = sum), and solve the resulting linear equation for $x$.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: (3)