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JEE MATHEMATICS MCQ: STATISTICS

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Application +4 | -1

Let

9=x_{1} < x_{2} < \ldots < x_{7}

be in an A.P. with common difference

d

. If the standard deviation of

x_{1}, x_{2} \ldots x_{7}

is 4 and the mean is

\bar{x}

, then

\bar{x}+x_{6}

is equal to:

View answer and explanation

Correct option: B

34

Option B (34) is correct because it is the sum of the mean and the 6th term of the A.P., calculated using the given standard deviation.

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