3.in a quiz, each student in math class had to answer 20 questions.5 points was given for each correct answer and 1 point for every wrong answer was added.You answered all 20 questions and scored 80 points.How many questions did you answer correctly?
A.15 B.16 C.17 D.18
A.15 B.16 C.17 D.18
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Answer A
explanation
5 point × to all the choices
5 × 15 = 75 so its letter A
5 × 16 = 80 so not its letter B
5 × 17 = 85 so not the letter C
5 × 18 = 90 so not the letter D
why letter A ?, because you gotta add your score in wrong answer which is 5
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Answer:
A
Step-by-step explanation:
15 × 5 = 75
75 + 5 = 80
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