John purchased some shirts and trousers for $1100. He paid $550 less for the shirts than he did for the trousers. If he bought 5 shirts and the cost of a shirt is $20 less than that of a trouser, how many trousers did he buy?  Choose one:  A) 4  B) 5  C) 6  D) 7  E) 11
Given that the total purchase of two items cost 1100.   So the average purchase of one item will cost  1100/2= 
<gadget id="calculator"> 1100/2</gadget>
<output>550</output>
550.   Its given as total shirt cost 100$ less. Hence Total Shirt cost= 550 - 275 and Total trouser cost = 300 + 275   5 shirts = 275$ ==&gt; One shirt = 55$   One trouser = 55 + 20= 
<gadget id="calculator">55 + 20</gadget>
<output>75</output>
75$   Total trousers= 825 / 75= 
<gadget id="calculator">825 / 75</gadget>
<output>11</output>
11.   11
<result>E</result>
John purchased some shirts and trousers for $1100. He paid $550 less for the shirts than he did for the trousers. If he bought 5 shirts and the cost of a shirt is $20 less than that of a trouser, how many trousers did he buy?