Teaching EMRS PGT Mock Test 2023 Mathematics Statistics Measures of Central Tendency

A data set of n observations has mean 2M, while another data set of 2n observations has mean M. What is the mean of the combined data sets?

1
M
2
\(\rm \dfrac{3M}{2}\)
3
\(\rm \dfrac{2M}{3}\)
4
\(\rm \dfrac{4M}{3}\)
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