Martin bought 10 concert tickets, some at the full price of $2.00 per ticket, and some at a discounted price of $1.60 per ticket. If he spent a total of $19.20, how many discounted tickets did he buy?  Choose the correct choice from the following answers
A) 3	B) 4	C) 5	D) 6	E) 2
Let x be the number of tickets he bought at $2 per ticket.   then 2 x + (10-x)1.6 = 19.2   0.4x = 3.2 =&gt; x = 8   discounted tickets = 10 -x = 2   Ans : 2
<result>E</result>
Martin bought 10 concert tickets, some at the full price of $2.00 per ticket, and some at a discounted price of $1.60 per ticket. If he spent a total of $19.20, how many discounted tickets did he buy?