The average of 10 consecutive integers is 25. Then, 9 is deducted from the first consecutive number, 8 is deducted from the second, 7 is deducted form the third, and so on until the last number which remains unchanged. What is the new average?	Choose the correct choice from the following options
A) 19 B) 19.5 C) 20 D) 20.5 E) 21
The total subtracted is (9+8+...+1) = (9*10) / 2= 
<gadget id="calculator">(9*10) / 2</gadget>
<output>45</output>
45   On average, each number will be reduced by   45/10= 
<gadget id="calculator">  45/10</gadget>
<output>9/2 = around 4.5</output>
4.5   Therefore, the overall average will be reduced by 4.5   The answer is 20.5.
<result>D</result>
The average of 10 consecutive integers is 25. Then, 9 is deducted from the first consecutive number, 8 is deducted from the second, 7 is deducted form the third, and so on until the last number which remains unchanged. What is the new average?