Answer:
Simply subtract the fail rate from 100; the resulting number is the pass rate. So, if you know that 6 percent of students failed, you would subtract: 100 - 6 = 94 percent is the pass rate for the test.
Explanation:
19:20
500 test scores
25 failing
500 -25 = 475 = passing scores
passing:all scores
475: 500
Divide each side by 25
475/25:500/25
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