Multiple choice

The marks scored by Rohit in two tests were $65$ and $70$. Find the minimum marks he should score in the third test to have an average of at least $65$ marks.

  1. $60$
  2. $65$
  3. $70$
  4. $75$
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A Correct answer
Explanation

Average of 3 tests >= 65 means (65 + 70 + x) / 3 >= 65. 135 + x >= 195, so x >= 60.

AI explanation

To find the required total for an average of 65 across three tests, multiply 65 by 3 to get a needed total of 195 marks. The sum of the first two tests is 65 plus 70, which equals 135. Rohit must score 195 minus 135, equaling 60, on his third test.

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