PowerPoint Presentation - WiFiStudy.com...(B) 100 m (C) 90 m (D) 120 m The average age of A and B is...
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PowerPoint Presentation - WiFiStudy.com...(B) 100 m (C) 90 m (D) 120 m The average age of A and B is 20 years. If A is replaced by C then it becomes 19 years. Average of C and A is