The mean of 5 different numbers is 6 and the mean of 4 different numbers is 15. Find the mean of 9 numbers.

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decoreyjpaipxv

08.06.2023

Mathematics

If 2 + $\sqrt{3}$ is a root then 2 - $\sqrt{3}$ is a root

Irrational roots always occur in conjugate pairs

2 ± $\sqrt{3}$ are a conjugate pair

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The mean of 5 different numbers is 6 and the mean of 4 different numbers is 15. Find the mean of 9 numbers.​