Answer:
0.98
Step-by-step explanation:
Assuming the number of questions on all the tests is 10,
9+9+10+10+10 / 50
You get 50 by doing 5 quizzes x 10 questions per quiz.
48/50 = 0.98
q = 5
40 - 3q = 5q
40 = 8q
5 = q
