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Q JEE MAIN 2026
The mean and variance of 10 observations are 9 and 34.2 , respectively. If 8 of these observations are 2,3,5,10,11,13,15,21, then the mean deviation about...
JEE Main Mathematics Medium
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Q JEE MAIN 2026
If the mean and the variance of the data

are $\mu$ and 19 respectively, then...
JEE Main Mathematics Easy
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Q JEE MAIN 2026
The mean and variance of a data of 10 observations are 10 and 2 , respectively. If an observations $\alpha$ in this data is replaced...
JEE Main Mathematics Medium
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Q JEE MAIN_2026_
Let the mean and variance of 8 numbers $-10,-7,-1, x, y, 9,2,16$ be $\frac{7}{2}$ and $\frac{293}{4}$, respectively. Then the mean of 4 numbers $...
JEE Main Mathematics Medium
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Q JEE MAIN 2026
If the mean deviation about the median of the numbers $\mathrm{k}, 2 \mathrm{k}, 3 \mathrm{k}, \ldots \ldots, 1000 \mathrm{k}$ is 500 , then $\mathrm{k}^2$ is...
JEE Main Mathematics Easy
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Q JEE MAIN 2026
Let the mean and variance of 7 observations $2,4,10, x, 12,14, y, x>y$, be 8 and 16 respectively. Two numbers are chosen from $...
JEE Main Mathematics Medium
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Q Statistics_ JEE MAIN_2019_
If for some $x \in R$, the frequency distribution of the marks obtained by 20 students in a test is:
JEE Main Mathematics Medium
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Q JEE MAIN 2019
If the standard deviation of the numbers –1, 0, 1, k is $\sqrt{5}$ where k > 0, then k is equal to :
JEE Main Mathematics Easy
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Q JEE-Advanced 2025
Consider the following frequency distribution
JEE Advance Mathematics Easy
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Q JEE MAIN 2020
If the variance of the terms in an increasing A.P., $b_1, b_2, b_3, \ldots, b_{11}$ is 90 , then the common difference of this A.P....
JEE Main Mathematics Medium
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