Evaluate (51 + 52 + 53 + ... + 100)  Select
A) 3775	B) 3665	C) 3456	D) 3459	E) 3569

Rationale: sn = ( 1 + 2 + 3 + . . . + 50 + 51 + 52 + . . . + 100 ) - ( 1 + 2 + 3 + . . . + 50 ) = ( 50 x 101 ) - ( 25 x 51 ) = ( 5050 - 1275 ) = 3775 . option a
Answer: A