(74 + 75 + 76 + 77 + ..... + 149 + 150) = ?
Choose the correct choice from the following options
A) 8624
B) 8634
C) 8654
D) 8644
E) 8677
Explanation:   Sum of first n natural numbers   = (1 + 2 + 3 + ..... + n) = n(n+1)/2   (74 + 75 + 76 + .....+ 150)   =(1 + 2 + .... + 73 + 74 + 75 + .....+ 150) - (1 + 2 + .... + 73)   =(1/2 x 150 x 151) - (1/2 x 73 x 74)   = 11325 - 2701= 
<gadget id="calculator">11325 - 2701</gadget>
<output>8_624</output>
8624   8624nswer: Option 8624
<result>A</result>
(74 + 75 + 76 + 77 + ..... + 149 + 150) = ?