8 JEE Main 2025 Statistics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2025 previous-year questions from the Statistics chapter of Mathematics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Statistics chapter hub.
For a statistical data x₁, x₂, …, x₁₀ of 10 values, a student obtained the mean as 5.5 and ₌₁¹⁰ xi²=371. He later found…
If the mean and the variance of 6,4, a, 8, b, 12,10, 13 are 9 and 9.25 respectively, then a+b+a b is equal to :
The mean and standard deviation of 100 observations are 40 and 5.1 , respectively, By mistake one observation is taken…
Let the Mean and Variance of five observations x₁=1, x₂=3, x₃=a, x₄=7 and x₅=b, a b, be 5 and 10 respectively. Then the…
Let x₁, x₂, …, x₁₀ be ten observations such that ₌₁¹⁰ (xi-2 )=30, ₌₁¹⁰ (xi-β )²=98, β2 , and their variance is (4)/(5)…
Marks obtains by all the students of class 12 are presented in a freqency distribution with classes of equal width. Let…
The variance of the numbers 8,21,34,47, …, 320 is
Let the mean and the standard deviation of the observation 2,3,3,4,5,7, a, b be 4 and √(2) respectively. Then the mean…