Here:
PFA for the answers. The numbering might confuse you. It goes from the 1 to the last marked question in ascending order. Hope it helps you. ~BYE
Answer: 
Step-by-step explanation:
Formula : Probability = 
Given , Sam has 4 cards numbered 2,3,5, and 7.
His friend has 4 cards numbered 1,2,6 and 7.
If they both draw one card and put that on table , then the possible combinations of cards would be (2,1) , (2,2), .... (7,6), (7,7).
i.e. Number of possible outcomes would be (S) 4 x 4 = 16
Favorable outcomes that they will choose same number (F) = (2,2) , (7,7)
Now , the probability that they will both choose the same number would be :

Hence, the required probability = 
I hope this helps you
x^2-5x-6
x -6
x +1
(x-6)(x+1)
x^2+5x-6
x +6
x -1
(x+6)(x-1)
It is rational because it doesn't go on forever
Answer:
B
Step-by-step explanation:
It's a relationship