Using it's formula, it is found that the accuracy of the test was of 0.85 = 85%.
The accuracy of a test is given by the number of correct results divided by the number of results.
In this problem, there are 80 tests, and of those, 5 + 7 = 12 had incorrect results, hence 68 had correct results.
Hence the accuracy of the test is given by:
a = 68/80 = 0.85 = 85%.
More can be learned about the accuracy of a test at https://brainly.com/question/3128152
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