The mean of four numbers is $12$. When the greatest number is removed, the mean becomes $9$. What number was...
I'm Akash, a nine-year-old fourth-grader living in San Angelo, Texas. Here's a question that I couldn't solve, apparently:
The mean of four numbers is $12$. When the greatest number is removed, the mean of the remaining three numbers is $9$. What number was removed?
Thanks so much if you can solve it! PS: You probably can. LOL :)
means
edited Nov 29 at 3:52
Andrei
10.9k21025
asked Nov 29 at 3:28
TECHron
11
closed as off-topic by Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh Nov 29 at 7:50
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh
If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
I'm Akash, a nine-year-old fourth-grader living in San Angelo, Texas. Here's a question that I couldn't solve, apparently:
The mean of four numbers is $12$. When the greatest number is removed, the mean of the remaining three numbers is $9$. What number was removed?
Thanks so much if you can solve it! PS: You probably can. LOL :)
means
edited Nov 29 at 3:52
Andrei
10.9k21025
asked Nov 29 at 3:28
TECHron
11
closed as off-topic by Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh Nov 29 at 7:50
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh
If this question can be reworded to fit the rules in the help center, please edit the question.
Aakash, you must show your efforts and where you are stuck.
– Shailesh
Nov 29 at 3:32
add a comment |
I'm Akash, a nine-year-old fourth-grader living in San Angelo, Texas. Here's a question that I couldn't solve, apparently:
The mean of four numbers is $12$. When the greatest number is removed, the mean of the remaining three numbers is $9$. What number was removed?
Thanks so much if you can solve it! PS: You probably can. LOL :)
means
edited Nov 29 at 3:52
Andrei
10.9k21025
asked Nov 29 at 3:28
TECHron
11
I'm Akash, a nine-year-old fourth-grader living in San Angelo, Texas. Here's a question that I couldn't solve, apparently:
The mean of four numbers is $12$. When the greatest number is removed, the mean of the remaining three numbers is $9$. What number was removed?
Thanks so much if you can solve it! PS: You probably can. LOL :)
means
means
edited Nov 29 at 3:52
Andrei
10.9k21025
asked Nov 29 at 3:28
TECHron
11
edited Nov 29 at 3:52
Andrei
10.9k21025
asked Nov 29 at 3:28
TECHron
11
edited Nov 29 at 3:52
Andrei
10.9k21025
edited Nov 29 at 3:52
Andrei
10.9k21025
edited Nov 29 at 3:52
Andrei
10.9k21025
10.9k21025
asked Nov 29 at 3:28
TECHron
11
asked Nov 29 at 3:28
TECHron
11
asked Nov 29 at 3:28
TECHron
11
11
closed as off-topic by Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh Nov 29 at 7:50
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh
If this question can be reworded to fit the rules in the help center, please edit the question.
closed as off-topic by Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh Nov 29 at 7:50
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Shailesh, Lord Shark the Unknown, max_zorn, Chinnapparaj R, Brahadeesh
If this question can be reworded to fit the rules in the help center, please edit the question.
Aakash, you must show your efforts and where you are stuck.
– Shailesh
Nov 29 at 3:32
add a comment |
Aakash, you must show your efforts and where you are stuck.
– Shailesh
Nov 29 at 3:32
Aakash, you must show your efforts and where you are stuck.
– Shailesh
Nov 29 at 3:32
Aakash, you must show your efforts and where you are stuck.
– Shailesh
Nov 29 at 3:32
add a comment |
1 Answer
1
active
oldest
votes
If you know the mean and the number of terms, you know the sum (mean=sum/# of terms). From the first sentence, you find the sum of four numbers. In the second sentence you get the sum of the remaining three. Can you take it from here?
answered Nov 29 at 3:34
Andrei
10.9k21025
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you know the mean and the number of terms, you know the sum (mean=sum/# of terms). From the first sentence, you find the sum of four numbers. In the second sentence you get the sum of the remaining three. Can you take it from here?
answered Nov 29 at 3:34
Andrei
10.9k21025
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
add a comment |
If you know the mean and the number of terms, you know the sum (mean=sum/# of terms). From the first sentence, you find the sum of four numbers. In the second sentence you get the sum of the remaining three. Can you take it from here?
answered Nov 29 at 3:34
Andrei
10.9k21025
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
add a comment |
If you know the mean and the number of terms, you know the sum (mean=sum/# of terms). From the first sentence, you find the sum of four numbers. In the second sentence you get the sum of the remaining three. Can you take it from here?
answered Nov 29 at 3:34
Andrei
10.9k21025
If you know the mean and the number of terms, you know the sum (mean=sum/# of terms). From the first sentence, you find the sum of four numbers. In the second sentence you get the sum of the remaining three. Can you take it from here?
answered Nov 29 at 3:34
Andrei
10.9k21025
answered Nov 29 at 3:34
Andrei
10.9k21025
answered Nov 29 at 3:34
Andrei
10.9k21025
answered Nov 29 at 3:34
Andrei
10.9k21025
10.9k21025
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
add a comment |
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
Yeah, I'm pretty sure I can. Thanks a lot, Andrei (if that's your username)!
– TECHron
Nov 29 at 3:50
add a comment |
Aakash, you must show your efforts and where you are stuck.
– Shailesh
Nov 29 at 3:32