The final score of ECON21 is determined by the average score of the 5 tests, and the final project. The weight of the average 5 tests is 0.75, and the weight of the final project is 0.25. The average scores of the first 3 tests is 90, and the score of the final project is 56. What is the average score of the last 2 tests can make ECON21's final score of 80?
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正确答案: E