A person's income and expenditure's ratio is 12 :10.If the yearly savings is Rs.1800,his monthly income is ?
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Let the ratio be 12x : 10x
Savings = income - expenditure
∴ Savings = 12x - 10x = 2x
1800 = 2x
x = 1800 ÷ 2
x = 900
Income = 12 × x
Income = 12 × 900 = 10800
Monthly Income = 10800 ÷ 12 = 900
∴ The person's monthly earnings are Rs. 900
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