Question 1178328
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Hi
the average number of questions answered correctly by all ten students:
           7*15 = 105  (15 the Integer average of the other 7 students)
      25 + 7*15  = 130  
 (8 + 8 + 9 + 105)/10 =  130/10 = {{{highlight_green(13 )}}} 

Wish You the Best in your Studies.
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