What is the sum of natural numbers between 40 and 100  Choose the correct choice from the following choices:
A) 4800  B) 4270  C) 5000  D) 5500  E) 5550
a = first number   l = last number   Sn = n/2[a + l]   between 40 and 100 numbers = 61 =&gt; 100 - 40= 
<gadget id="calculator">100 - 40</gadget>
<output>60</output>
60 + 1= 
<gadget id="calculator">60 + 1</gadget>
<output>61</output>
61   Sn= 61/2 Ã— 140 = 61 Ã— 70 = 4270   Answer : 4270
<result>B</result>
What is the sum of natural numbers between 40 and 100