Q185
A man ordered 4 pairs of black socks and some pairs of brown socks. The price of a pair of black socks is double that of a brown pair. While preparing the bill the clerk interchanged the number of black and brown pairs by mistake which increased the bill by 50% . The ratio of the number of black and brown pairs of socks in the original order was = ?
A.
2 : 1
B.
1 : 4
AnswerC.
1 : 2
D.
4 : 1
Answer: Option B
Solution
Answer: Option B
Solution:
| Black | : | Brown | |
| Pairs | 4 | : | x |
| Price | 2 | : | 1 |
| 8 | : | x |
Original bill = 8 + x
| Black | : | Brown | |
| Pairs | x | : | 4 |
| Price | 2 | : | 1 |
| 2x | : | 4 |
New bill = 2x + 4
According to the question,