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The average marks obtained by Suvir in 15 tests is 29. Ruchira is maintaining an average of 27 so far but has taken only 11 of the tests so far. How much does Ruchira have to score on an average in the remaining four tests to match Suvir’s performance? 

The average marks obtained by Suvir in 15 tests is 29. Ruchira is maintaining an average of 27 so far but has taken only 11 of the tests so far. How much does Ruchira have to score on an average in the remaining four tests to match Suvir’s performance?  Correct Answer 34.5

Average marks obtained by Suvir in 15 tests = 29

Sum of marks obtained by Suvir in 15 tests = 29 × 15 = 435

Average marks obtained by Ruchira in 11 tests = 27

Sum of marks obtained by Ruchira in 11 tests = 27 × 11 = 297

Remaining test of Ruchira = 15 – 11 = 4 tests

Ruchira have to score in 4 remaining tests are = 435 – 297 = 138 marks

Average marks in remaining 4 tests which have to score by Ruchira = 138/4 = 34.5

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