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23-05-2017
Mathematics

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when 4,140 people attended a concert hall is 90% full. Calculate the maximum amount of people needed to make the hall filled.

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MathisLif3 MathisLif3

23-05-2017

If 4140 ppl fill a concert hall 90% full,
=> 4140/x=.9 for x-maximum number
=>x=4140(10)/9=x

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