Asked by Ryda
The average of 7 numbers is 30. the average of the first to the fourth numbers is 32, the average of the third to the seventh numbers is 27. What is the sum of the third and the fourth numbers? I want the answer please.
Answers
Answered by
drwls
Here is what you know:
x1 + x2 + x3 + x4 = 32*4 = 128
x3 + x4 + x5 + x6 + x7 = 27*5 = 135
x1 + x2 + x3 + x4 + x5 + x6 + x7 = 7*30 = 210
From the first and third equation:
x5 + x6 + x7 = 210 - 128 = 82
From the second equation and the one above:
x3 + x4 = 135 - 82 = 53
x1 + x2 + x3 + x4 = 32*4 = 128
x3 + x4 + x5 + x6 + x7 = 27*5 = 135
x1 + x2 + x3 + x4 + x5 + x6 + x7 = 7*30 = 210
From the first and third equation:
x5 + x6 + x7 = 210 - 128 = 82
From the second equation and the one above:
x3 + x4 = 135 - 82 = 53
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.