The average of 45 results is 8. The average of first 22 of them is 15 and that of last 22 is 20. Find the 23 result?
Choose the correct choice from the following answers.
A) 600 B) 470 C) 750 D) 650 E) 560
23th result = sum of 45results - sum of 44 results   8*45-15*22+20*22 = 360-330+440= 
<gadget id="calculator">360-330+440</gadget>
<output>470</output>
470   Answer is 470
<result>B</result>
The average of 45 results is 8. The average of first 22 of them is 15 and that of last 22 is 20. Find the 23 result?