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21-08-2014
Mathematics

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George found that he blinked 85 times in 15 minutes. At this rate, how many minutes passed during 51 blinks?

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21-08-2014

[tex]Proportion:\\85\ -\ 15\\51\ -\ x\\\\85x=15*51\\85x=765\\x=9\\\\51\ blinks\ takes\ 9\ minutes[/tex]

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