![The overall average grade of a math course is based on homework (10 %) , quizzes (40 %) , and tests (50 %) . Ted has a 90 average for howework , 81 for quizzes , and 85 for tests . What is his overall average ? The overall average grade of a math course is based on homework (10 %) , quizzes (40 %) , and tests (50 %) . Ted has a 90 average for howework , 81 for quizzes , and 85 for tests . What is his overall average ?](https://d10lpgp6xz60nq.cloudfront.net/web-thumb/195770911_web.png)
The overall average grade of a math course is based on homework (10 %) , quizzes (40 %) , and tests (50 %) . Ted has a 90 average for howework , 81 for quizzes , and 85 for tests . What is his overall average ?
![Data Table: calculate average from output of two sum aggregations - Kibana - Discuss the Elastic Stack Data Table: calculate average from output of two sum aggregations - Kibana - Discuss the Elastic Stack](https://global.discourse-cdn.com/elastic/original/3X/e/0/e0fcab23f427096cb40ad6517ec2726239e5d203.png)
Data Table: calculate average from output of two sum aggregations - Kibana - Discuss the Elastic Stack
![Mathematical Mistake: Averaging Multiple Statistical Sources Together to Form One “Overall” Average Income Figure – Economica Mathematical Mistake: Averaging Multiple Statistical Sources Together to Form One “Overall” Average Income Figure – Economica](http://economica.ca/wp-content/uploads/2017/02/ew13_1p2t1.gif)