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…When an increase in the price of a commodity lead to…A decrease in the demand for a product X resulted in…In bank reconciliation, when a cash book shows a…Let the quantity demanded in units of a particular…