Question

The mean of a set of numbers is $\bar { x }$ . If each number is multiplied by λ, then the mean of new set is

• A. $\bar { x }$
• B. $\lambda + \bar { x }$
• C. $\lambda \bar { x }$
• D. None of these

Answer 1

Answer: (C)

$\lambda \bar { x }$

Answer 2

,

New mean = $= \lambda \frac { \Sigma x _ { i } } { n }$ $= \lambda \bar { x }$.