the average of 5 numbers is 27 . if one number is excluded the average become 25 . the excluded number is : Choose the correct choice from the following answers
A) 25
B) 27
C) 30
D) 35
E) 37

Rationale: solution excluded number = ( 27 × 5 ) - ( 25 × 4 ) = 135 - 100 = 35 . answer d
Answer: D