Teacher, I drew 20 cards from a set of playing cards. What are the chances of being king or Wang Ying Jr.

Teacher, I draw 20 cards from a set of playing cards, and the probability of winning Wang or Xiao Wang is 1/27. According to relevant information, there are 54 playing cards in a deck, including 2 national trump cards and 2 small trump cards. The probability of drawing a card from a deck is 2/54, that is, 1/27.