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Rs. 9000 were divided equally among a ce...

Rs. 9000 were divided equally among a certain number of persons. Had there been 20 more persons, each would have got Rs. 160 less. Find the original number of persons.

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Given that, Rs.` 9000 `were divided equally among a certain number of persons. Had there been `20` more persons, each would have got Rs. `160` less.
Amount which each receives when a persons are present `= 9000/a`
Expressing the given condition we have,
`\Rightarrow 9000/(a+20) = (9000/a – 160) `
...
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