Answer:
the probability of picking one of the two black suits is 1/2
Step-by-step explanation:
Probability outcome: spades or club = 12 + 12 =26
Event space = 52 (i.e 13 × 4)
Pr(one of the two black suits) = pr(spades) + pr(club)
                         = 13 ÷ 52  +  13÷52
                          =26÷52
                          = 1÷2