There would be two black jacks. As a fraction, there would be 1/26.
Black Jacks - 2014 1-1 was released on: USA: 2014
Black Jacks - 2014 1-2 was released on: USA: 2014
Black Jacks - 2014 1-3 was released on: USA: 2014
Black Jacks - 2014 1-4 was released on: USA: 2014
Black Jacks - 2014 1-5 was released on: USA: 2014
Black Jacks - 2014 1-6 was released on: USA: 2014
Black Jacks - 2014 1-7 was released on: USA: 2014
Black Jacks - 2014 1-8 was released on: USA: 2014
Black Jacks - 2014 1-9 was released on: USA: 2014
In a standard deck of 52 playing cards, there are two black jacks: the Jack of Spades and the Jack of Clubs. Each suit has one jack, and since there are four suits in total, only the two black suits contain black jacks.
pink lion