JEE Main · MathematicsEasy

$If the mean of 5 observations x, x + 2, x + 4, x + 6, x + 8 is 11, find the value of x .$

A. $7$
B. $8$
C. $9$
D. $10$

Show correct answer & step-by-step solution

Correct answer: A — $7$

Solution

The sum of the observations is $5x + 20$. Dividing by 5 gives the mean x + 4 = 11, which results in x = 7 .

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