If $5, k, 11$ are in $A P,$ then the value of $k$ is

6

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8

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7

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9

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Solution

The correct option is C $8$
If $5, k$ and $11$ are in AP, then
$k - 5 = 11 - k$
$∴ 2 k = 16$
$∴ k = 8$

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