There is not enough context to answer the question.
But if you add all the test grades together (which there should be 6 I think) then you divide by 6 and you get the average test grade
Answer: 
Step-by-step explanation:

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If you go through the multiplication table of 3, you can pick out the ones between 5 and 31:
6, 9, 12, 15, 18, 21, 24, 27, 30
Which is 9 numbers. I hope this helps!
Answer:
20/24
Step-by-step explanation:
If you simplify, you get 5/6.