Ononot — Two datasets A (nA = 10, \bar{x}A = 20) and B (nB = 10, \bar

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Descriptive Statisticsmedium

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Two datasets $A$ ( $n_A = 10, \bar{x}_A = 20$ ) and $B$ ( $n_B = 10, \bar{x}_B = 40$ ) are merged. What is the mean of the combined dataset?