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First calculate how many you need to get right, by solving the following proportion:

x/80 = 70/100

Note that there are some assumptions here:

  • Grading is in percentage.
  • Each question has the same weight.
  • You don't get partial credit for partially correct answers. Each answer is either wrong or right.
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14y ago

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Q: How many questions wrong on an 80 question test to get a 70?
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