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A and B are subsets of the universal set...

A and B are subsets of the universal set `uu` such that `n (uu)=800, n(A)=300, n(B)=400` and `n(A nn B)=100`. The number of elements in the set `A^(c )nn B^(c )` is equal to

A

100

B

200

C

300

D

400

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