Question 387522
Let the grades on the 4th and 5th tests = {{{a}}} and {{{b}}}
The problem wants to know what is {{{(a + b)/2}}}
given:
{{{(91 + 87 + 86 + a + b)/5 = 95}}}
{{{264 + a + b = 5*95}}}
{{{a + b = 475 - 264}}}
{{{a + b = 211}}}
{{{(a + b)/2 = 105.5}}}
It looks like you can't average 95% for the 5 tests, because
then you would need to get better than 100% on the 4th and 5th tests