Multiple choice

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.

  1. 25

  2. 35

  3. 40

  4. 45
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B Correct answer
Explanation

Average of at least 60 for 3 tests means total marks >= 180. Current total = 70 + 75 = 145. Minimum marks needed = 180 - 145 = 35.

AI explanation

To achieve an average of 60 across three tests, the total marks required using the fundamental average formula is 3 times 60, which equals 180. Ravi has already obtained 70 and 75 marks, giving a subtotal of 145. The minimum marks he needs in the third test are 180 minus 145, which equals 35.

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