The average of 50 numbers is 38. If two of the numbers 45 and 55 are removed, what is the average of the remaining 48 numbers?
50个数的平均数是38，如果把其中两个数45和55去掉，那么剩下的48个数的平均数是多少．
<gadget id="calculator">38 * 50</gadget>
<output>1_900</output>

<gadget id="calculator">1_900 - 55 - 45</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 / 48</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>