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The distributions X and Y with total num...

The distributions X and Y with total number of observations 36 and 64, and mean 4 and 3 respectively are combined. What is the mean of the resulting distribution X + Y?

A

3.26

B

3.32

C

3.36

D

3.42

Text Solution

Verified by Experts

The correct Answer is:
C
`"Required mean"=(36xx4+64xx3)/(36+64)=(144+192)/(100)=(336)/(100)`
`=3.36`
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