addzeyofficial addzeyofficial

25-04-2022
Mathematics

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Mac has taken seven maths exams this year. His average mark is 78%. What mark must he get on the eighth exam to raise his average to 80%?

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joemamamamamamamm joemamamamamamamm

25-04-2022

Answer:

94

Step-by-step explanation:

7*78 + x = 8*80

x = 94

Or, think that he was short 2 points on each of 7 tests, so he has to make them all (14) up on the last test.

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