Find the variance of the first $20$ natural numbers.

  • A
    $\frac{133}{4}$
  • B
    $\frac{379}{12}$
  • C
    $\frac{133}{2}$
  • D
    $\frac{399}{4}$

Explore More

Similar Questions

The variance of $10$ observations is $16$. If each observation is doubled,then the standard deviation of the new data will be -

$A$ student scores the following marks in five tests: $54, 45, 41, 43, 57$. His score is not known for the sixth test. If the mean score is $48$ in six tests,then the standard deviation of marks in six tests is

Consider the following frequency distribution:
$C$.$I$.$75$-$175$$175$-$275$$275$-$375$$375$-$475$$475$-$575$$575$-$675$$675$-$775$
$f_i$$3$$2$$1$$0$$1$$2$$3$
If the variance of this distribution is $60000$,then the coefficient of variation of the distribution is:

The variance of the following frequency distribution is:
Classes$0-10$$10-20$$20-30$$30-40$$40-50$$50-60$
Frequency$11$$29$$18$$4$$5$$3$

If $A$ and $B$ are the variances of the first $n$ even numbers and the first $n$ odd numbers respectively,then:

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo