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Q21. Ravi obtained 70 and 75 marks in first two unit test. Find the minimum marks he should get in the third test to have an average of at least 60 marks.
Answers (1)
Let x be marks obtained by Ravi in the third test.
The student should have an average of at least 60 marks.
the student should have minimum marks of 35 to have an average of 60
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