Sally received the following scores on her math quizzes: 50, 80, 80, 60, 40, 90, 100, 70, and 60. Find her mean score.
Sally's total score is 50 + 80 + 80 + 60 + 40 + 90 + 100 + 70 + 60 = 
<gadget id="calculator">50+80+80+60+40+90+100+70+60</gadget>
<output>630</output>
630.
Her mean score is 630 / 9/quizzes = 
<gadget id="calculator">630/9</gadget>
<output>70</output>
70/quiz.

<result>70</result>