A person ordered 5 pairs of black socks and some pairs of brown socks. The price of a black pair was thrice that of a brown pair. While preparing the bill, the bill clerk interchanged the number of black and brown pairs by mistake which increased the bill by 100%. What was the number of pairs of brown socks in the original order?
Explanation & Solution
Correct Option: (D) 25
Let brown pairs=x, price of brown pair=p. Original bill=15p+xp, Wrong bill=5p+3xp. Given: 5p+3xp=2(15p+xp). Solving: x=25.
हिंदी में प्रश्न एवं आदर्श उत्तर
A person ordered 5 pairs of black socks and some pairs of brown socks. The price of a black pair was thrice that of a brown pair. While preparing the bill, the bill clerk interchanged the number of black and brown pairs by mistake which increased the bill by 100%. What was the number of pairs of brown socks in the original order?
सही उत्तर: (D) 25
Let brown pairs=x, price of brown pair=p. Original bill=15p+xp, Wrong bill=5p+3xp. Given: 5p+3xp=2(15p+xp). Solving: x=25.