JEE MATHEMATICS MCQ: STATISTICS

1 Easy

1 of 1

Application +4 | -1

Let the mean and the variance of 5 observations

x_1

x_2, x_3, x_4, x_5

\frac{24}{5}

and

\frac{194}{25}

respectively. If the mean and variance of the first 4 observation are

\frac{7}{2}

and a respectively, then

\left(4 a+x_5\right)

is equal to

View answer and explanation

Correct option: B

Option B (15) is correct because it is the value obtained by using the given mean and variance to find the missing value and then calculating 4a + x_5.

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\bar X,

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