(51+52+53+………+100) is equal to:  Choose the correct answer.
A) 2525	B) 2975	C) 3225	D) 3775	E) 3885

Rationale: "( 51 + 52 + 53 + … … … + 100 ) = ( 1 + 2 + 3 + … … . + 100 ) - ( 1 + 2 + 3 + 4 + … … + 50 ) = ( 100 * 101 ) / 2 - ( 50 * 51 ) / 2 = ( 5050 - 1275 ) = 3775 . answer : d"
Answer: D