There are 5 numbers whose sum is 150. If they are arranged in ascending order, the average of the first three numbers is 28, and the average of the last three numbers is 32. What is the third number?
有5个数，它们的和是150，如果把它们从小到大排列，那么前3个数的平均数是28，后三个数的平均数是32，那么第三个数是多少．
<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">32 * 3</gadget>
<output>96</output>

<gadget id="calculator">96 - 150</gadget>
<output>-54</output>

<gadget id="calculator">84 + (-54)</gadget>
<output>30</output>

<result>30</result>