A father given 1% of the monthly income to his two some has pocket mony. They elder son gets 80% of the total amount of money given and he spends 80% of his shos. If he save re 20 per months determine fathers monthly income.
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Let father's incone be x rupees
Therefore, Share given to sons
=1/100*x
=x/100
Share given to elder son
=80/100*x/100
=80x/10000
Share saved by him
=20/100*80x/10000
=1600x/1000000
Therefore,
1600x/1000000=20
1600x=20000000
x=20000000/1600
x=12,500
Therefore, father's income is Rs.12,500
Therefore, Share given to sons
=1/100*x
=x/100
Share given to elder son
=80/100*x/100
=80x/10000
Share saved by him
=20/100*80x/10000
=1600x/1000000
Therefore,
1600x/1000000=20
1600x=20000000
x=20000000/1600
x=12,500
Therefore, father's income is Rs.12,500
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