Question 297439
Let {{{x}}} = the sum of the first 3 quiz scores
given:
{{{x/3 = .79}}}
{{{x = 2.37}}}
Let {{{y}}} = the sum of the last 5 quiz scores
{{{(2.37 + y)/(5 + 3) = .84}}}
{{{2.37 + y = .84*8}}}
{{{y = 6.72 - 2.37}}}
{{{y = 4.35}}}
{{{4.35/5 = .87}}}
The average score of the last 5 quizes is 87%