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Q.

What is the arithmetic mean of 10, 30, 40, and 50?


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a

32.5

b

33

c

34

d

35 

answer is A.

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Detailed Solution

Given, 10, 30, 40 and 50.
We know that mean = Sum of all observationsNumber of observations.
= 10 + 30 + 40 + 504
= 1304
= 32.5
Hence, the mean of the given observations is 32.5.
So, option 1 is correct.
 
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