Math 141, Sem. I, 1998-99 (R.A. Brualdi)
Handout 23 (December 4, 1998)
Topic: Quiz #7
1. Urn I contains three Red and 6 Blue balls; urn II contains
two Red and two blue balls. A ball is selected at random from
urn I and put into urn II. A ball is selected at random
from urn II, and then a second ball is selected at random from
the remaining balls in urn II. Determine:
a) the probability that of the balls selected from urn II, one is
Red and the other is Blue.
b) the probability that the two balls selected from urn II have
the same color.
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Scratch work - I will not read this.
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Polished solution:
2. Consider an ordinary deck of cards, and a game in which
a "hand" consists of 4 cards. Determine
a) the probability that a hand consists of all aces;
b) the probability that a hand consists of exactly two aces;
c) the probability that a hand consists of one card of each of the
four suits.
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Scratch work - I will not read this.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Polished solution: