The average of 10 consecutive odd numbers is 22. What is the sum of the first 3 numbers?
Choose the correct choice from the following:
A) 13  B) 45  C) 17  D) 220  E) 90
22 = (n + n+2 + n + 4 + ... + (n + 18))/10   22 = (10n + (2 + 4 + ... + 18))/10   220 = 10n + 2(1 + 2 + ... + 9)   220 = 10n + 2(9)(10)/2   220 = 10n + 90   220 - 90 = 10n   130 = 10n   n = 13   So the first three numbers are 13, 15, 17   13 + 15 + 17= 
<gadget id="calculator">13 + 15 + 17</gadget>
<output>45</output>
45   Option 45
<result>B</result>
The average of 10 consecutive odd numbers is 22. What is the sum of the first 3 numbers?