Answer:
reciprocal means inverse:

 
        
             
        
        
        
Answer:

Step-by-step explanation:
Given

 --- selection
 --- selection
Required
Probability of choosing a pair with only B, C and F
The total selection is: 36
This is calculated as thus:
 --- First selection can be any of the 6 cards
 --- First selection can be any of the 6 cards
 --- Second selection can be any of the 6 cards [No restriction]
 --- Second selection can be any of the 6 cards [No restriction]
So, we have:



The pair of only B, C or F is:


So, the probability is:


Simplify

 
        
             
        
        
        
Answer:
1 < x < 2
Step-by-step explanation:
2 < 3x - 1 < 5
Add 1 to each side
2+1 < 3x - 1+1 < 5+1
3 < 3x  < 6
Divide all sides by 3
3/3 < 3x/3  < 6/3
1 < x < 2