Question 444394

1. probability that both cards are spades =  

13C2 / 52C2

 
2.  probability that the marble is black =  7/8


 
3.  Is it five dice?


probability that at no dice shows a two i.e P(A) =  5/6 * 5/6 * 5/6 * 5/6 * 5/6

 = 3125/7776

now, probability that at least one show a two = P'(A)= 1-P(A) 

= 1- 3125/7776

= 4651/7776