Q. The standard deviation of a variable $x$ is 10. Then, the standard deviation of $50 + 5x$ is
A) 50
B) 550
C) 10
D) 500
Explanation
(a)
Given the standard deviation (SD) of the variable $x$ is 10.
$\therefore$ Standard deviation of 50+$5x = 5x = 50\ \ \ \lbrack\because x = 10\rbrack$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.