Consecutive integers

[davo45]

For any positive integer n, the sum of the first n pos integers equals n(n+1)/2. what is the sum of all the even integers between 99 and 301?

(a) 10,100
(b) 20,200
(c) 22,650
(d) 40,200
(e) 45,120

[rohu27]

https://www.beatthegmat.com/sum-of-even- ... 73600.html

For any positive integer n, the sum of the first n pos integers equals n(n+1)/2. what is the sum of all the even integers between 99 and 301?

(a) 10,100
(b) 20,200
(c) 22,650
(d) 40,200
(e) 45,120