Question

# At what condition |A U B|= |A| + |B|?

Solution

## The equation is |A ∪ B| = |A| + |B| – |A ∩ B| So,|A ∪ B| = |A| + |B| Then |A ∩ B| Should be zero  that is |A ∩ B| =0

Suggest corrections