after deducting 10% from a sum and 20% percent from the remainder, rs 3600 are left. Find the original amount
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3600 is 80% then 3600/4=900=>3600+900=4500
4500 is 90% then 4500/9=500=>4500+500=5000
so, the final ans is 5000
4500 is 90% then 4500/9=500=>4500+500=5000
so, the final ans is 5000
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