An elementary school teacher learned that 40 percent of school age children have at least 3 cavities.The teacher has 30 students in his class.What is the standard deviation for the number of school age children that have at least 3 cavities?

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The Answer of An elementary school teacher learned that 40 percent of school age children have at least 3 cavities.The teacher has 30 students in his class.What is the standard deviation for the number of school age children that have at least 3 cavities?

An Elementary School Teacher Learned That 40 Percent of School