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How many answers do I need to get correct if I want a grade of 80 percent on a test with 70 questions?A.40B.65C.33D 56
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How many answers do I need to get correct if I want a grade of 80 percent on a test with 70 questions?A.40B.65C.33D 56

User Rivered
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\begin{gathered} \\ 80\text{ percent = }(n)/(70)\text{ x 100} \\ (80)/(100)\text{ = }(n)/(70) \\ \text{Cross multiple} \\ 100n\text{ = 80 x 70} \\ 100n\text{ = 5600} \\ n\text{ = }(5600)/(100)\text{ } \\ n\text{ = 56} \end{gathered}

User Serginho
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