Question 339108
You would use the technique of finding the average of a set of numbers which is add the numbers then divide by how many numbers you added.
{{{(83+90+63+89+x+y)/6 >= 79}}} x and y are the scores of the last two exams. Multiply both sides by 6.
{{{(325+x+y) >= 474}}} Subtract 325 from both sides.
{{{x+y >= 149}}} Now find the average of these.
{{{(x+y)/2 >= 149/2}}}
The lowest possible average would be 74.5