What is the sum of all three digit integers formed using the digits 3,4 and 5 (repetition is allowed) Choose the most appropriate option.
A) 11982
B) 11984
C) 11985
D) 11988
E) 11986
n = 3*3*3= 
<gadget id="calculator">3*3*3</gadget>
<output>27</output>
27= (555 + 333) / 2= 
<gadget id="calculator">(555 + 333) / 2</gadget>
<output>444</output>
444   Sum= number of integers x average value   n * = 27 * 444= 
<gadget id="calculator">27 * 444</gadget>
<output>11_988</output>
11988   answer= 11988
<result>D</result>
What is the sum of all three digit integers formed using the digits 3,4 and 5 (repetition is allowed)