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NDA 2018
Exam
NDA
Year
2018
Subject
Mathematics
Chapter
Statistics

NDA 2018 · Mathematics · Statistics

The variance of 25 observations is 4. If 2 is added to each...

The variance of 25 observations is 4. If 2 is added to each observation, then the new variance of the resulting observations is

Options

  1. A2
  2. B4
  3. C6
  4. D8

Correct answer

B. 4

Step-by-step solution

Variance will not change by adding or subtracting a fixed value to all the elements.
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