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in Basic Algebra by (46.9k points)
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Ravi obtained 70 and 75 marks in first two unit tests. Find the minimum marks he should get in the third test to have an average of at least 60 marks.

1 Answer

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by (49.1k points)
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Best answer

Let x be the marks obtained by Ravi in the third test. 

Then, (70 + 75 + x)/3 ≥ 60

⇒ 145 + x ≥ 180 ⇒ x >180 – 145

⇒ x ≥ 35 

Thus, Ravi must obtain a minimum of 35 marks to get an average of at least 60 marks. 

Note: A minimum of 35 marks. 

⇒ Marks greater than or equal to 35.

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