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 :
A. 58
B. 56
C. 50
D. 46
Answer: Option B
Solution (By Examveda Team)
Let the new observation be = xAccording to the question,
6 × 45.5 + x = 7 × 47
273.0 + x = 329
x = 329 - 273
x = 56
This Question Belongs to Arithmetic Ability >> Average
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