a) The probability of drawing an ace or king =   
 
b) The probability of drawing a diamond or king =   
 
Step-by-step explanation:
Step 1 :
Total number of cards in the deck = 52
We need to compute probability that card drawn is 
a) ace or king
b) King or diamond
Step 2 :
a)
Number of ace in the pack = 4
Number of kings in the pack = 4 
Hence the probability of selecting an ace or king =   [total favorable divided by the total outcome] =
 [total favorable divided by the total outcome] =  
 
Step 3:
b)
Number of king in the card deck = 4
Number of diamond in the card deck = 13
Number of diamond cards which is a king = 1
Total number of cards that can be drawn ( king or diamond) = 4 + 13 - 1 = 16 
Hence probability that a diamond or king is drawn =   [total favorable divided by the total outcome]  =
  [total favorable divided by the total outcome]  =   
 
Step 4 :
Answer :
a) The probability that card drawn is an ace or king =   
 
b) The probability that card drawn is a diamond or king =  