Published by:
CGP EDU Academic Team
Published on: August 22, 2026
The mean of a set of 30 observations is 75. If each observation is multiplied by a non-zero number 
and then each of them is decreased by 25, their mean remains the same. Then 
is equal to
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
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