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:Abdul is faced with a choice between buying a new…If an increase in earning leads to more of a…When an increase in the price of a commodity lead to…Since money is demanded for what it can buy, the…Demand is said to be price elastic, if the absolute…