A joke about the group?

The school began to buy basketball collectively, and our dormitory decided to buy a basketball collectively. Let's discuss it. Let's go to the shops and supermarkets near our home to inquire about the price, shop around and weigh before buying. Yesterday, Xiao Yao and I came to the sporting goods store near her home. Seeing someone selling basketball, we went forward to ask. "150 yuan, it's too expensive!" We shook our heads. The salesman quickly said, "I can give you a discount if you buy it collectively." Xiaoyao was overjoyed: "Of course we bought it collectively!" "How many?" The salesman was so happy that he grabbed the list and started. Xiaoyao pushed the black-rimmed glasses and said seriously, "We will buy one collectively for six people!" " collective activity

The first-grade children went out for an outing, and the teacher said that no matter what they did, they should do 10 group activities. After a while, someone suddenly shouted, "Who else wants to go to the toilet? Hurry up! Nine of us can't hold back! "