Answer:
Event : choosing a red pen from Box B, Event : choosing a blue pen from Box B, Event : choosing a blue pen from Box A, Event : choosing a blue or black pen from Box A.
Step-by-step explanation:
I used logic to figure it out, I'm not sure what to say. Though I would like to mention that the event that choosing a blue pen from box A and the event of choosing a blue pen from box B is the same, unless there is more that I don't know.
Keep living!
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