The number of questions that Peter missed are = 4 questions
The total number of questions Peter has = 20
The percentage of question Peter got correctly = 80%
Therefore, 80% of the 20 questions =
[tex] \frac{80}{100} \times 20 [/tex]
= 0.8 × 20
= 16 questions.
This means that Peter got 16 questions correct.
Therefore, the question he missed = 20 - 16
= 4 questions.
Learn more here:
https://brainly.com/question/24472946
