Question

the mean of variable x is 25. Find the mean of the variable obtained by the first subtracting 3 from x and then dividing it by 2?​

Answer 1

Step-by-step explanation:

Correct option is

C

2

Mean =10 and standard deviation =5

So, variance(v)=5

2

=25

∴E(x)

2

=25+10

2

=125

∴E(

25

x

2

+225−30x

)=

25

1

(E(x)

2

+225−30E(x))=2