Question 287453
for every 6 quizzes, there is 1 test.  If we have 11 tests then we would have 6 times as many quizzes.  So if we have 11 tests, we would have 66 quizzes.  Since there are 77 semester grades, and 66 quizzes plus 11 tests equal 77 semester grades, there will be 11 tests.