The ratio of boys and girls participating in a mathematics competition in the seventh grade of the High School Attached to Zhongda University is 3:2. The average score of this competition is 82 points. The average score of boys is 84 points. What is the average score of girls?
中大附中七年级参加某次数学竞赛的男生和女生的比是3：2，这次竞赛的平均成绩是82分，其中男生的平均成绩是84分，女生的平均成绩是多少分
<gadget id="calculator">82 * 3</gadget>
<output>246</output>

<gadget id="calculator">82 * 2</gadget>
<output>164</output>

<gadget id="calculator">84 * 3</gadget>
<output>252</output>

<gadget id="calculator">164 - 252</gadget>
<output>-88</output>

<gadget id="calculator">246 + (-88)</gadget>
<output>158</output>

<gadget id="calculator">158 / 2</gadget>
<output>79</output>

<result>79</result>