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Problem #20 · August 16, 2026

Percentages

The test consists of 50 questions. The student answered all the questions. The student answered 84%84\% of the questions correctly. How many questions did the student answer incorrectly?
  1. A1616
  2. B88
  3. C4242
  4. D3434
  5. E1010

WORKED EXAMPLE

Solution

Correct answers: 50⋅0,84=4250 \cdot 0{,}84 = 42, so the incorrect answers are 50−42=850 - 42 = 8. A short way: the share of the incorrect answers is 100%−84%=16%100\% - 84\% = 16\%, that is, 50⋅0,16=850 \cdot 0{,}16 = 8.
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