[tex] \large\underline \mathcal{{QUESTION:}}[/tex]
the mean of the 20 numbers is 20 and the mean of 30 other numbers is 30. what is the mean of all 50 numbers?
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[tex] \large\underline \mathcal{{SOLUTION:}}[/tex]
[tex]\sf{Mean=\frac{20\times20+30\times30}{50}}[/tex]
[tex]\sf{Mean=\frac{400+900}{50}}[/tex]
[tex]\sf{Mean=\frac{1300}{50}}[/tex]
[tex]\sf{Mean=26}[/tex]
[tex]\\[/tex]
[tex] \large\underline \mathcal{{ANSWER:}}[/tex]
- The mean of the 50 numbers is 26
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