原来四个数的平均数是多少

  • 时间:2020-05-31 15:41:53
  • 分类:数学世界
  • 阅读:181 次

有四个数,用其中3个数的平均数,再加上另外的一个数,按这样的方法计算,分别得到:28、36、42、46,那么原来四个数的平均数是多少?

数学题解答:假设28是甲乙丙的平均数+丁,36是甲丙丁的平均数+乙,42是甲乙丁的平均数+丙,46是乙丙丁的平均数+甲,将这四个数加起来,所得的和中包含了两次甲乙丙丁的和,所以这四个数的平均数可以这样算:

28+36+42+46=152

152÷2=76…………四个数的和

76÷4=19…………四个数的平均数

推荐阅读:
8 Content Marketing Plugins You Need For Your WordPress Blog  Tips to Make Money from the Comfort of Your Own Home  5 Tips for Protecting Your Freelance Business from Liabilities  5 Easy Ways On How To Build An Authority Website  How to Protect Your WordPress Site From Hackers  Top 10 Relationship Blogs With the Best Pieces of Advice in 2020  How to Construct Binary Search Tree from Preorder Traversal in P  Dynamic Programming Algorithm to Compute the Block Sum in a Matr  Smallest Multiple Algorithm using Bruteforce or GCD/LCM  How many different ways can £2 be made using any number of coins 
评论列表
添加评论