Offline paper
Mathematics · 2014
JEE Main 2014 · 2014-04-06 Offline · Q87
The variance of first 50 even natural numbers is:
The variance of first $\displaystyle 50$ even natural numbers is :
Official answer
(4)
$\displaystyle 833$
More from Statistics
- The sum of 100 observations and the sum of their squares are 400 and 2475, respectively. Later on, three observations, 3, 4 and 5, were found to be…2017
- If Σ_i=1^16 a_i-6=8 and Σ_i=1^16 a_i-6^2=40, then the standard deviation of a_1, a_2, …, a_16 is2021
- The outcome of each of 30 items was observed; 10 items gave an outcome 1/2 - d each, 10 items gave outcome 1/2 each and the remaining 10 items gave…2019
- If the variance of the terms in an increasing A.P., b_1, b_2, b_3, …, b_11 is 90, then the common difference of this A.P. is \ \ \ \.2020
- If the mean and the standard deviation of the data 3,5,7, a, b are 5 and 2 respectively, then a and b are the roots of the equation:2020
- The mean of a set of 30 observations is 75. If each observation is multiplied by a non-zero number λ and then each of them is decreased by 25, their…2018
- The mean and variance of 7 observations are 8 and 16 respetively. If two observations are 6 and 8, then the variance of the remaining 5 observations…2021
- The frequency distribution of the age of students in a class of 40 students is given below. If the mean deviation about the median is 1.25, then 4…2024
JEE Main 2014 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.