Choosing properly?

What percentage must Justin average across his next two test so that his overall average will be 90%? (Can 1 and/or 2 be used to help answer the question)

1) The subsequent two tests will be his fifth and sixth test
2) His present average is 88%

A) Statement # 1 contains enough information to answer the interview
B) Statement # 2 contains enough information to answer the grill
C) Either statement can answer the question
D) Both statements are required to answer the question
E) More information is needed


Answers:    E)

We call for to know how much each exam is weighted. I'm not going to assume.
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