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:An increase in the demand for butter reduces the…Let the quantity demanded in units of a particular…Since money is demanded for what it can buy, the…A decrease in the demand for a product X resulted in…Determine the price elasticity of demand if the…