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The average marks obtained by Raghav in 12 tests is 24. Zubeida has maintained an average of 23 so far but has taken only 9 of the tests. If each test is out of 30, at least how much must Zubeida score in any one of the remaining three tests to still have a chance to match Raghav’s performance?

The average marks obtained by Raghav in 12 tests is 24. Zubeida has maintained an average of 23 so far but has taken only 9 of the tests. If each test is out of 30, at least how much must Zubeida score in any one of the remaining three tests to still have a chance to match Raghav’s performance? Correct Answer 21

The average marks obtained by Raghav in 12 tests is 24,

⇒ Total marks of Raghav = 12 × 24 = 288

Zubeida has maintained and average of 23 so far but has taken only 9 of the tests,

⇒ Total marks of Zubeida of 9 test = 9 × 23 = 207

⇒ Difference = 288 – 207 = 81

∴ The least require marks = 81 – 30 – 30 = 21

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