Multiple Choice Questions

After deducting 20 from a certain sum and then 10 from the remainder there is Rs 7 200 left Find the...........

Quantitative Aptitude (CPO) Percentage

After deducting 20% from a certain sum, and then 10% from the remainder, there is Rs. 7,200 left. Find the original sum.

This questions was previously asked in

SSC CPO 9th Nov 2022 Shift 3

Rs. 9,000

Rs. 10,000

Rs. 7,500

Rs. 7,800

- Let's call the original sum "X".

- After deducting 20%, 80% of X remains: $0.80 \times X$ .

- Then, 10% is deducted from that remainder, leaving 90% of the remainder: $0.90 \times (0.80 \times X)$ .

- This accounts for the final amount of Rs. 7,200.

- Setting up the equation, $0.90 \times 0.80 \times X = 7, 200$ .

- Simplifying, $0.72 \times X = 7, 200$ .

- Solving for X: $X = \frac{7, 200}{0.72} = 10, 000$ .

- Option 1: Rs. 9,000 is too low.

- Option 2: Rs. 10,000 is the correct choice.

- Option 3: Rs. 7,500 is too low.

- Option 4: Rs. 7,800 is too low.

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