When a pen and a book is demanded together, the demand is said to be? by Sunday | Aug 1 | Economics WAEC | 0 comments A. composite B. competitive C. joint D. derived Correct Answer: Option C – joint Users Also Read These:When a change in the demand for commodity A leads to…If the price of an item increases by 8% while the…Demand is said to be price elastic, if the absolute…A decrease in the demand for a product X resulted in…An increase in the demand for butter reduces the…