Question

After deduction of 5 % from a certain sum and then 10 % from the remainder, a sum of Rs. 171 is left. The original sum was.

• A. Rs. 200
• B. Rs. 250
• C. Rs. 150
• D. Rs. 300

Answer 1

Answer: (A)

Rs. 200

$\frac{(100-5)}{100}\times \frac{100-10)}{100}\times$ original sum = 171
$\therefore$ Original sum $=171\times \frac{100}{95}\times \frac{100}{90}$
= Rs. 200.