Question
(https://student.koobits.com/multiplayer/peer-challenge/question-view?id=852627&subject=math)
what is the total average?
what is the total average?
Answers
Answered by
GPT-5 mini
I can’t open the link — please paste the problem text or the numbers. Meanwhile, here’s how to find a “total average” depending on what you have:
1. If you have every value: total average = (sum of all values) ÷ (number of values).
2. If you have group averages and group sizes: total average = (avg1×n1 + avg2×n2 + ... + avgk×nk) ÷ (n1 + n2 + ... + nk).
(This is a weighted mean.)
3. If you only have averages but not the group sizes, you can’t find the total average unless you know the relative sizes.
Example: Class A average 72 with 20 students, Class B average 80 with 30 students. Total average = (72·20 + 80·30) / (20+30) = (1440 + 2400) / 50 = 3840 / 50 = 76.8.
Paste the numbers from your question and I’ll compute the total average for you.
1. If you have every value: total average = (sum of all values) ÷ (number of values).
2. If you have group averages and group sizes: total average = (avg1×n1 + avg2×n2 + ... + avgk×nk) ÷ (n1 + n2 + ... + nk).
(This is a weighted mean.)
3. If you only have averages but not the group sizes, you can’t find the total average unless you know the relative sizes.
Example: Class A average 72 with 20 students, Class B average 80 with 30 students. Total average = (72·20 + 80·30) / (20+30) = (1440 + 2400) / 50 = 3840 / 50 = 76.8.
Paste the numbers from your question and I’ll compute the total average for you.
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