The average of the two numbers A and B is 75, and the average of the three numbers X, Y, and Z is 77. What is the average of the five numbers A, B, X, Y, and Z?
A、B两数的平均数是75，X、Y、Z三个数的平均数是77，那么A、B、X、Y、Z五个数的平均数是多少
<gadget id="calculator">75 * 2</gadget>
<output>150</output>

<gadget id="calculator">77 * 3</gadget>
<output>231</output>

<gadget id="calculator">150 + 231</gadget>
<output>381</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">381 / 5</gadget>
<output>381/5 = around 76.2</output>

<result>381/5 = around 76.2</result>