Assessment Resource Banks

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 __________.

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