Question

a math quiz consist of 30 questions. the first 20 questions are worth 4 points each. the last 10 questions are worth 7 points each. no points will be deducted for each wrong answer. Justin scores 124 points on a math quiz. how many of the first 20 questions and how many of the last 10 questions does he answer correctly?

Answer 1

25

Explanation:

Total points: (20x4) + (10x7) = 150

Justin scored 124/150

150-124 = ones he didn't get correct

150-124 = 26

26 = 4 + 7 + 4 +7 + 4

We are trying to figure out how many he answered correctly NOT how many he got wrong.

There are 30 questions. He got 5 wrong. That means he got 25 correct.

Answer 2

Answer: He got 17 from the first 20questions and 8 from the last 10 questions

Step-by-step explanation:please see attachment for explanation