Question

Jerry took a 50-item Math test. If he answered 4/5 of the test items correctly, how many questions did he answer in correctly?
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Answer 1

Answer: 50×4/5=40 (the amount of correct answers)

50-40=10 (except the correct answers, not correct answers are left)

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50×(1-4/5)=50×1/5=10 (subtract the ratio of correct answer from the whole to get the ratio of incorrect answers)

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50/5=10 (split the whole into 5 groups)

5-4=1 (correct answers take up 4 groups, the remaining 1 group is incorrect)

10×1=10 (use the amount of people in a group times the amount of groups they occupy)

Step-by-step explanation: PLEASE MARK AS BRAINIEST