A number is chosen from the set of numbers S = {11, 12, 13, 14, 15, 16, 17, 18,

A number is chosen from the set of numbers S = {11, 12, 13, 14, 15, 16, 17, 18, 19}. Find the probability
1. the number is even
2.the number is a prime number.
3.the number is odd and less than 17

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