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Q JEE MAIN 2025
Let the Mean and Variance of five observations $x_1=1, x_2=3, x_3=a, x_4=7$ and $x_5=b, a>b$, be 5 and 10 respectively. Then the Variance of the...
JEE Main Mathematics Medium
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Q JEE MAIN 2025
Let the mean and the standard deviation of the observation $2,3,3,4,5,7, a, b$ be 4 and $\sqrt{2}$ respectively. Then the mean deviation about the mode...
JEE Main Mathematics Medium
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Q JEE MAIN 2025
If the mean and the variance of 6, 4, a, 8, b, 12,10,13 are 9 and 9.25 respectively, then a + b + ab is...
JEE Main Mathematics Medium
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Q JEE MAIN 2023
Let the mean of the data \begin{tabular}{|l|l|l|l|l|l|} \hline$x$ & 1 & 3 & 5 & 7 & 9 \\ \hline Frequency $(f)$ & 4 &...
JEE Main Mathematics Medium
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Q JEE-Main 2023
The mean and variance of a set of 15 numbers are 12 and 14 respectively. The mean and variance of another set of 15 numbers...
JEE Main Mathematics Easy
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Q JEE MAIN 2023
The number of ordered triplets of the truth values of $p, q$ and $r$ such that the truth value of the statement $...
JEE Main Mathematics Easy
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Q JEE MAIN 2023
Let the mean and variance of 8 numbers x, y, 10, 12, 6, 12, 4, 8, be 9 and 9.25 respectively. If x > y,...
JEE Main Mathematics Easy
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Q JEE MAIN 2023
If the mean of the frequency distribution then its variance is ______.
JEE Main Mathematics Easy
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Q JEE-Main 2023
The mean and variance of a set of 15 numbers are 12 and 14 respectively. The mean and variance of another set of 15 numbers...
JEE Main Mathematics Easy
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Q JEE MAIN
The frequency distribution of the age of students in a class of 40 students is given below. JEE Main Mathematics Medium
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