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Question

Singapore Chinese Orchestra performed at the Mariana Grand Theatre for 3 days. On the first day, there were 320 more boys than girls in the audience. On the second day,the number of boys decreased by 1/8 while the number of girls increased by 25%. On the third day,the number of boys decreased by 3/7 while the number of girls increased by 20%. If there were 6560 boys and girls on the third day,find the sum of money collected from the ticket sales over the 3 days if each ticket was sold at $25.
How to do?
Tks

Answer

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