Answer:
a) 0.00031
b)  0.0017
c)  0.31 
d) 0.00018
Step-by-step explanation:
attached below is the detailed solution
Total number of 7-poker cards are 52P7 = 133784560
A) Determine the probabilities of Seven-card straight 
probability of seven-card straight = 0.00031
B) Determine the probability of four cards of one rank and three of a different rank 
 P( four cards of one rank and three of different rank ) = 0.0017
C) Determine probability of three cards of one rank and two cards of each two different ranks 
P( three cards one rank and two cards of two different ranks ) = 0.31 
D) Determine probability of two cards of each of three different ranks and a card of a fourth rank
P ( two cards of each of three different ranks and a card of fourth rank ) =  0.00018
 
        
             
        
        
        
It would be 3 with be on the side and then 2/10
        
             
        
        
        
the correct option is answer choice D, because there are multiple 2's in the x column with different f(x) values.
 
        
             
        
        
        
Answer:
C
Step-by-step explanation: