The average of 50 numbers id 56. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is :  Pick one:
A) 22.35
B) 33.25
C) 22.25
D) 51.35
E) 56.25

Rationale: explanation : total of 50 numbers = ( 50 × 56 ) = 2800 total of 48 numbers = ( 2800 - ( 45 + 55 ) ] = 2700 required average = 2700 / 48 = 56.25 answer : e
Answer: E