Mathematics
If n(universal set) = 80 and n(A) = 50, then n(complement of set A) is :
80
50
30
none of these
Sets
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Answer
n(universal set) = 80
n(A) = 50
n(complement of set A) = n(universal set) - n(A)
⇒ n(complement of set A) = 80 - 50
⇒ n(complement of set A) = 30
Hence, option 3 is the correct option.
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