Question: Suppose th at A 1 , A 2 , A 3 form a partition of the universal set S. Let B be an arbitrary set.

Suppose th at A1, A2, A3 form a partition of the universal set S. Let B be an arbitrary set. Assume that we knowBnA BnA BnA = 10, = 20, = 15.

Find |B|.

BnA BnA BnA = 10, = 20, = 15.

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