6 July 2023

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21 April 2023

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14 September 2022

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4 June 2021

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4 July 2013

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23 January 2012

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2 October 2011

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5 June 2011

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• curprev 15:1415:14, 5 June 2011 Gina talk contribs 1,147 bytes +152 No edit summary
• curprev 15:0915:09, 5 June 2011 Gina talk contribs 995 bytes +995 Created page with "==Problem== A teacher gave a test to a class in which <math>10\%</math> of the students are juniors and <math>90\%</math> are seniors. The average score on the test was <math>84..."