(Answered) Of all the tax returns filed in canada in a particular year

Statistics

Of all the tax returns filed in Canada in a particular year, 12% were prepared by H&R Block. If 1,000 of these tax returns are randomly selected, what is the approximate probability that between 110 and 140, inclusive, were prepared by H&R Block? Justify the use of the approximation you use, and make sure to define the random variable under consideration.

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