On an order of 5 dozen boxes of a consumer product, a retailer receives an extra dozen free. This is equivalent to allowing him a discount of:  Choose one.
A) 18 1/6%	B) 16 2/3%	C) 10 2/3%	D) 29 1/3%	E) 16 2/3%
E   Clearly, the retailer gets 1 dozen out of 6 dozens free.   16 2/3%quivalent discount = 1/6 * 100 = 16 2/3%.
<result>E</result>
On an order of 5 dozen boxes of a consumer product, a retailer receives an extra dozen free. This is equivalent to allowing him a discount of: