The average of 6 observations is 45.5. If one new observatio
The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new average becomes 47. The new observation is
A58
B56
C50
D46
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Answer is : 56
Explanation :
Given, The average of 6 observations is 45.5.
Sum of Total Observation = 6×45.5=273If one new observation is added to the previous observations, then the new average becomes 47.
Let the new observation be x
273+x7=47
273+x=329x=56
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