In a marriage party total 278 guests were present 20 guests took Pepsi and Dew, 23 guests took Dew and Sprite and 21 guest took Pepsi and Sprit and 9 guests took all the three cold drink viz, Pepsi, Sprite and Dew. It is also known that these were equal number of bottle of each of three kind viz. Pepsi, Dew and Sprite.