Question

If 40 is added to each of a set of 25 values, the Coefficient of Variation changes to 40% and if it is subtracted from each value, the Coefficient of Variation rises to 80%. What is the mean and standard deviation of the set of 25 values?
(a) Mean= 120; SD = 74
(b) Mean= 120; SD=64
(c) Mean= 130; SD =64
(d) None

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Answer 1

correct option is b

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Answer 2

Answer:

B

Step-by-step explanation:

Option b is correct

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