A box contains 4 tickets with numbers 112, 121, 211 and 222. One ticket is drawn from it. Let `A_(i) (i = 1, 2, 3)` be the event that its digit at the number on ticket drawn is 1. Discuss the independence of the events `A_(1),A_(2),A_(3)`.
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Events are pairwise independent. And not mutually independent.
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