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estimated that 30% of households own a riding lawn mower. A sample of 30 scholds is selected and studied, From this sample, how many are expected to own lawn mower? What is the standard deviation of this distribution? What is the probability that exactly 10 households own a riding lawn mower? What is the probability that more than 10 of these own a riding lawn mower? What is the probability that less than 15 of these own a riding lawn mower