A man ordered 4 pairs of black socks and some pair of brown socks. The price of a 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 Choose the correct choice from the following options
A) 1:4
B) 1:2
C) 1:3
D) 1:5
E) 1:7
Let the price of a pair of brown socks=x, then price of a pair of black socks=2x   If in original order there are 'a' pairs of brown socks, then total price= 4*2x + a*x   With interchanging number of black and brown pairs, new price=a*2x + 4*x   Given new price is 50% more than the original, So a*2x+4*x= (150/100)(4*2x+a*x)   =&gt; 2ax+4x= (3/2)(8x+ax)   =&gt; 4ax - 3ax= 16x   =&gt; a=16 = original number of pairs of brown socks   So ratio of number of black and brown pairs of socks in original order= 4:16 =1:4   1:4NSWER:1:4
<result>A</result>
A man ordered 4 pairs of black socks and some pair of brown socks. The price of a 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