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Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE-MAIN 2021

Consider a set of 3n numbers having variance 4. In this set, the mean of first 2n numbers is 6 and the mean of the...

JEE Main Mathematics Easy

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Q JEE MAIN 2021

The mean of 6 distinct observations is 6.5 and their variance is 10.25. If 4 out of 6 observations are 2, 4, 5 and 7,...

JEE Main Mathematics Easy

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Q JEE MAIN 2021

Let in a series of $2 n$ observations, half of them are equal to a and remaining half are equal to .a. Also by adding...

JEE Main Mathematics Medium

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Q JEE MAIN 2021

JEE Main Mathematics Medium

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Q JEE MAIN 2021

-If the mean and variance of six observations $7,10,11,15, a, b$ are 10 and $\frac{20}{3}$, respectively, then the value of $|a-b|$ is equal to :

JEE Main Mathematics Easy

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Q JEE MAIN 2021

If the variance of 10 natural numbers 1, 1, 1,...., 1, k is less than 10, then the maximum possible value of k is

JEE Main Mathematics Medium

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Q JEE MAIN 2021

The mean age of 25 teachers in a school is 40 years. A teacher retires at the age of 60 years and a new teacher...

JEE Main Mathematics Easy

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Q JEE MAIN 2021

Consider three observations a, b and c such that b = a + c. If the standard deviation of a + 2, b + 2,...

JEE Main Mathematics Easy

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Q JEE MAIN 2022

The mean and variance of the data $4,5,6,6,7,8, x, y$ where $x

JEE Main Mathematics Easy

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Q JEE MAIN 2022

Suppose a class has 7 students. The average marks of these students in the mathematics examination is 62, and their variance is 20. A student...

JEE Main Mathematics Hard

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