MHT CET · Maths · Statistics
The variance of 20 observations is 5 . If each observation is multiplied by 2 , then variance of resulting observations is
- A \(5\)
- B \(10\)
- C \(4\)
- D \(20\)
Answer & Solution
Correct Answer
(D) \(20\)
Step-by-step Solution
Detailed explanation
When each term of a data is multiplied by \(\lambda\), variance is multiplied by \(\lambda^2\).
\(\therefore \quad\) New variance \(=2^2 \times 5=20\)
\(\therefore \quad\) New variance \(=2^2 \times 5=20\)
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