The sum of a number and the two numbers preceding it is equal to 30. Find the number:  Select the correct option:
A) 10  B) 11  C) 9  D) 8  E) 7
Number is 9, AS  9 +10+11= 
<gadget id="calculator"> 9 +10+11</gadget>
<output>30</output>
30   Answer: 9
<result>C</result>
The sum of a number and the two numbers preceding it is equal to 30. Find the number: