The mean of $x, 2 x, 5 x + 1 a n d 3$ is

$2 x$

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$2 x + 1$

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$5 x + 1$

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$8 x$

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Solution

The correct option is B
$2 x + 1$

Compute the required value:
The mean of $x, 2 x, 5 x + 1 a n d 3$ is
$M e a n = \frac{s u m o f o b s e r v a t i o n s}{n o . o f o b s e r v a t i o n s} = \frac{x + 2 x + (5 x + 1) + 3}{4} = \frac{8 x + 4}{4} = 2 x + 1$
Hence, the option (B) is correct option.

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