Find the mean of the given probability distribution. The random variable X is the number of houses sold by a realtor in a single month at a particular real estate office. Its probability distribution is given in the table below. x|P(X=x) 0 1 2 3 4 5 6 7 3.40 3.60 3.50 3.35 0.24 0.01 0.12 0.16 0.01 0.14 0.11 0.21

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