Q406
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
AnswerC.
50
D.
46
Answer: Option B
Solution
Answer: Option B
Solution:
Let the new observation be = xAccording to the question,
6 × 45.5 + x = 7 × 47
273.0 + x = 329
x = 329 - 273
x = 56