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The ratio between the monthly income of husband and wife working in the IT sector is 9:8 and the ratio of their individual expenditure is 8 : 7. If they save Rupees 9000 at the end of the month, then the wife's monthly salary is:
1. 81000
2. 72000
3. 63000
4. 56000

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Correct Answer - Option 2 : 72000

Given:

The ratio between the monthly income of husband and wife working in the IT sector is 9:8 and the ratio of their individual expenditure is 8 : 7

Calculation:

Let be assume the monthly salary of husband and wife is 9x and 8x respectively and expenditure 8y and 7y respectively

⇒ 9x - 8y = 9000 .... (1)

⇒ 8x - 7y = 9000 .... (2)

⇒ x = 9000

⇒ Salary of wife's = 8x = 8 × 9000 = 72000

∴ The required result will be 72000.

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