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:If an increase in earning leads to more of a…A total of 12000kg of maize was demanded at N20 per…Abdul is faced with a choice between buying a new…Let the quantity demanded in units of a particular…What is the elasticity of demand for commodity X, if…