Abox contains 4 black shirts, 8 blue shirts, 4 black pants, and 10 blue pants. determine the probability of randomly selecting a blue piece of clothing or a pair of pants. use the formula
p(aorb)  p(a)p(b)p(aandb)

From the given data, there are 18 pieces of clothing that is blue and there are 14 pair of pants. Also, there are 10 blue pants. All in all there are 26 items. To solve for the probability required above,
          P(Aor B) = (18/26) + (14/26) - (10/26)
                          = 22/26 or 11/13

The answer to your question is i think 7