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JEE 2022 — Mathematics PYQ

JEE | Mathematics | 2022

Let the mean and the variance of $5$ observations $x_1, x_2, x_3, x_4, x_5$ be $\frac{24}{5}$ and $\frac{194}{25}$ respectively. If the mean and variance of the first $4$ observations are $\frac{7}{2}$ and $a$ respectively, then $(4a + x_5)$ is equal to:

JEE 2022 — Mathematics PYQ

Choose the correct answer:

Explanation

Solution

1. Find the value of $x_5$

2. Find the value of $a$ (variance of 4 observations)

3. Calculate $(4a + x_5)$

Explanation

Solution

1. Find the value of $x_5$

2. Find the value of $a$ (variance of 4 observations)

3. Calculate $(4a + x_5)$

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