Q.17
Kindly refer the similar link for your query.
https://www.meritnation.com/ask-answer/question/a-b-c-are-3-mutually-exclusive-and-exhaustive-events-of-a-ra/probability/10982425
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https://www.meritnation.com/ask-answer/question/a-b-c-are-3-mutually-exclusive-and-exhaustive-events-of-a-ra/probability/10982425
Regards