A set of data is 4, x, 10, 5, 11. There are five numbers, and the average number is 7. What is the median of this set of data?
一组数据是4，x，10，5，11共有五个数，其平均数是7，则这组数据的中位数是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<gadget id="calculator">11 / 5</gadget>
<output>11/5 = around 2.2</output>

<gadget id="calculator">7 - (4/5) - 1 - 2 - (11/5)</gadget>
<output>1</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5)</gadget>
<output>5</output>

<result>5</result>