Question 1103649
Find the average counting this test twice.
{{{A=(79+81+77+80+T+T)/6}}}
{{{A=(2T+317)/6}}}
You also know that,
{{{85<A<90}}}
Substituting,
{{{85<(2T+317)/6<90}}}
{{{510<2T+317<540}}}
{{{193<2T<223}}}
{{{96.5<T<111.5}}}
Assuming the max score she can get is 100.
{{{96.5<T<=100}}}