arrow
arrow
arrow
The mean of the first ten even natural numbers is:
Question

The mean of the first ten even natural numbers is:

A.

10

B.

8

C.

11

D.

9

Correct option is C

Given:

We need to find the mean of the first ten even natural numbers.

Formula Used:

Mean =(Sum of all observations)  (Number of observations) \frac{\text{(Sum of all observations) }}{\text{ (Number of observations)}}

Solution:

Sum = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 110

Mean = 11010=11\frac{110}{10} = 11​​

Alternate Method:

First term = 2

Last term = 20

Mean = (First term + Last term) 2\frac{\text{(First term + Last term) }} 2​​

Mean =(2+20)2=222=\frac{ (2 + 20) }{ 2} =\frac{ 22 } 2 ​= 11

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 General Awareness Section Test 1

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon30 Marks
  • timerIcon25 Mins
languageIcon English
test-prime-package

Access ‘RRB NTPC’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
354k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow