Gaurav spends 30\% of his monthly income on food articles, 40\% of the remaining on conveyance and clothes and saves 50\% of the remaining. If his monthly salary is ₹ 18,400, how much money does he save every month?
(a)₹ 3624
(b)₹ 3864
(c)₹ 4264
(d)₹ 5888
Answer
Answer (as printed): B
Explanation
Saving $=50 \%$ of ( $100-40$ ) $\%$ of ( $100-30$ )\% of ₹ 18,400 $$=₹\left(\frac{50}{100} \times \frac{60}{100} \times \frac{70}{100} \times 18400\right)=₹ 3864 .$$
Explanation as extracted from the printed page; notation may be imperfect.