a store carries 4 brands of dvd players J,G,P,S.

a store carries 4 brands of dvd players J,G,P,S. from past records the manager found that the relative frequency of brands choice among customers varied, using the given probability values for each of the 4 brands, find the probability that a random customer will choose brand J or brand P

P(J)= 0.25, P(G)= 0.14, P(P)= 0.28, P(S)= 0.33