mean of binomial distribution

例句：

1. 1. The meaning of life is to find happiness and fulfillment in all aspects of our lives.
   生命的意义在于生活中寻找幸福和满足。
2. 2. The teacher's main goal was to help the students understand the meaning of mathematics.
   老师的主要目标是帮助学生理解数学的含义。
3. 3.The company's mission is to provide high-quality products and services that meet the needs of its customers.
   公司的愿景是提供高质量的产品与服务，以满足客户的需求。