A 10-year record of tornadoes per year to land in a particular region is 2, 2, 1,

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A 10-year record of tornadoes per year to land in a particular region is 2, 2, 1, 3, 2, 1, 0, 2, 3, and 1.

What is the probability of not having tornados in any 1 year? What are the average and variance of the number of tornadoes in 1 year?

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