Combo pack

During shopping in large shops/malls you always come across combo pack or offer. Say for instance you can get three tees for some money rather than picking them individually. Price wise it always makes sense, since it gets you the best offer, but on the choice wise you are fooled.

Out of the three tees, I am damn sure that one will be useless (bright red / maroon/ yellow color simply which you can not wear). What a trick these marketing guys play with you? They rip your money by getting you a simply useless offer.