its tuff for me I can't solve it please help
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The formula is
n(AuB) = n(A) + n(B) - n(A intersection B)
Putting the values in this formula, we get
n(A intersection B) = 2.
n(AuB) = n(A) + n(B) - n(A intersection B)
Putting the values in this formula, we get
n(A intersection B) = 2.
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