A certain box contains only black, blue, and red pens. If a pen is chosen at random from the box, the probability of choosing a black pen is \(\frac { 1 } { 4 } \) and the probability of choosing a blue pen is \(\frac { 1 } { 6 } \). What is the probability of choosing a red pen?
(A)\(\frac { 1 } { 24 } \) (B)\(\frac { 1 } { 12 } \) (C)\(\frac { 7 } { 12 } \) (D)\(\frac { 3 } { 4 } \) (E)It depends on the number of pens in the box.
C