A) \[\frac{a}{c}\sigma \]
B) \[\left| \frac{a}{c} \right|\sigma \]
C) \[\left| \frac{c}{a} \right|\sigma \]
D) \[\frac{c}{a}\sigma \]
Correct Answer: B
Solution :
\[\sigma \left( \frac{aX+b}{c} \right)=\sigma \left( \frac{aX}{c} \right)+\sigma \left( \frac{b}{c} \right)\] \[=\left| \frac{a}{c} \right|\sigma (X)+0\] \[=\left| \frac{a}{c} \right|\sigma \]
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