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in Commercial Mathematics by (33.5k points)
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Alka spends 90% of the money that she receives every month, and saves ₹ 120. How much money does she get monthly?

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Let Alka’s monthly income be ₹ x. 

Alka spends 90% of the money that she receives every month. 

∴ Amount spent by Alka = 90% of x

= \(\frac{90}{100}\) × x = 0.9x 100

Now, Savings = Income – Expenditure 

∴ 120 = x – 0.9x 

∴120 = 0.1 x 

∴ \(x = \frac{120}{0.1} = \)\(\frac{120\times10}{0.1\times10}\)

∴ x = 1200 

Alka gets ₹ 1200 monthly.

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