Question 981895
First five quizzes,
{{{(A+B+C+D+E)/5=72}}}
So,
{{{A+B+C+D+E=360}}}
So with five more quizzes, the average becomes,
{{{(A+B+C+D+E+F+G+H+I+J)/10=79}}}
{{{360+F+G+H+I+J=790}}}
{{{F+G+H+I+J=430}}}
Dividing by 5,
{{{(F+G+H+I+J)/5=86}}}
So you have to average an 86 for the next five quizzes.