If S and T are two sets such that n(S) = 21, n(T) = 32 and n(S ∩ T) = 11 then n(S ∪ T) = ?

Question

If S and T are two sets such that n(S) = 21, n(T) = 32 and n(S &cap; T) = 11 then n(S &cup; T) = ?

Accepted Answer

Answer explanation available.