2019 Pascal Problem 15

Sophie has written three tests. Her marks were 73\%, 82\% and 85\%. She still has two tests to write. All tests are equally weighted. Her goal is an average of 80\% or higher. With which of the following pairs of marks on the remaining tests will Sophie *not* reach her goal?

\textbf{(A)}\ 79\%\ \text{and}\ 82\%\quad \textbf{(B)}\ 70\%\ \text{and}\ 91\%\quad \textbf{(C)}\ 76\%\ \text{and}\ 86\%\quad \textbf{(D)}\ 73\%\ \text{and}\ 83\%\quad \textbf{(E)}\ 61\%\ \text{and}\ 99\%

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Pascal contests here.