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. 46

B. 50

C. 56

D. 58

Answer: Option C

Solution(By Examveda Team)

New observation
= (47 × 7) - (45.5 × 6)
= 329 - 273
= 56