Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science Statistics and Modelling

If the mean of two groups of 'm' and 'n' observations are 40 and 60 respectively, and the combined mean of two groups is 48, the ratio m ∶ n is

1
2 ∶ 3
2
3 ∶ 2
3
1 ∶ 2
4
2 ∶ 1
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