A certain store sells two types of pens: one tyoe for $2 per pen and the other types for $3 per pen. If a customer can spend up to $25 to buy pens at the store and there is no sales tax, what is the greatest number of pens the customer can buy? A) 9 B....
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To know the greatest number of pens the customer can buy, divide the amount by the cheapest pen then use the remaining to buy the expensive pen
$25/2= 12 pen Remaining $1
Since the money is remaining but cannot buy a unit of the other pen, we then reduce the number of the cheaper pen.
11*2= $22
Remaining $3= 1 pen (the expensive pen)
11 +1= 12 Pens
Answer: 12 (D)