What is the sum of all consecutive integers from 10 to 100, inclusive?	Choose the most appropriate option
A) 4550  B) 4950  C) 5005  D) 5500  E) 5555
SUM= n/2(Starting number+ Ending number)   n: total numbers between the starting no. and ending no.   n= 100-10+1= 
<gadget id="calculator">100-10+1</gadget>
<output>91</output>
91   SUM= (91/2)*(10+100)   = 91*55= 
<gadget id="calculator">91*55</gadget>
<output>5_005</output>
5005   Hence, answer 5005
<result>C</result>
What is the sum of all consecutive integers from 10 to 100, inclusive?