Cup of marbles

Ash

Ash has a cup containing ten marbles - four blue ones, three red ones, and the remainder are yellow. He shuts his eyes and picks out a marble.

a)
The probability that it is blue is:
 
 
(A) \(1 \over 9\)      (B) \(1 \over 4\)      (C) \(4 \over 10\)     (D) \(4 \over 6\)
 
(E)   None of these. The answer is __________.
 
b)
The probability that it is yellow is:
 
 
(A) \(1 \over 9\)     (B) \(3 \over 10\)     (C) \(1 \over 3\)     (D) \(3 \over 7\)
 
(E)   None of these. The answer is __________.
 
c)
The marble Ash picked out was blue. He put this blue marble on the table and then picked out another marble. 
The probability that this marble is red is:
 

(A) \(1 \over 9\)     (B) \(3 \over 10\)     (C) \(3 \over 9\)     (D) \(3 \over 8\)
 
(E)   None of these. The answer is __________.