Let X represent the number of tires with low air pressure on a randomly chosen car. The probability distribution of X is as follows. 1 3 4 P (x) 0.1 0.2 0.4 0.2 0.1 Send data to Excel

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A: Mean = ΣXi/n = (40+49+37+48+54+39)/6 = 44.5  

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