(51+ 52 + 53 + ... + 100) = ?
Choose the correct answer.
A) 2775
B) 2785
C) 2975
D) 3775
E) 4000
This is an A.P. in which a = 51, l = 100 and n = 50.   Sum =	n	(a + l)	=	50	x (51 + 100) = (25 x 151) = 3775.   2	2   3775)
<result>D</result>
(51+ 52 + 53 + ... + 100) = ?