A trader sold packets of milk and loaves of bread in the ratio 3:7 respectively. If he sold 28 loaves of bread, how many packets of milk did he sell?
The ratio of packets of milk to loaves of bread sold is 3:7.
To find out how many packets of milk the trader sold, we can use the ratio and the number of loaves of bread sold.
First, we can calculate the total number of packets of milk and loaves of bread sold using the ratio:
3x + 7x = 28 (where x is the constant of proportionality)
10x = 28
x = 2.8
Therefore, the trader sold 3 * 2.8 = 8.4 packets of milk.
Since the trader cannot sell a fraction of a packet of milk, we can conclude that he sold 8 packets of milk.