Given that A card is drawn at random from a pack of $52$ cards
To Find: Probability of the following
Total number of cards in a pack $=52$
(i) Number of cards which are black king $=2$
We know that the Probability = Number of favorable outcomes/ Total number of outcomes
Therefore, the probability of getting a black king $=2/52=1/26$
(ii) Total number of black cards is $(13+13)26$
Total number of kings are $4$ in which $2$ black kings are also included.
So, the total number of black cards or king will be $26+2=28$
As We know that, Probability = Number of favorable outcomes/ Total number of outcomes
Therefore, the probability of getting a black card or a king $=28/52=7/13$