A drawer contains n white and n black socks. Each white sock has unique design, and each black sock has a unique design. Two sock are selected at random from the drawer. Every way of selecting t two socks is equally likely and the order in which the socks are selected does not matter. a. How many ways are there to select the two socks? (Reduce yo answer to the simplest algebraic expression.) b. How many ways of selecting the socks result in two socks of the same color being chosen? (Reduce your answer to the simplest algebraic expression.) c. What is the probability of selecting two socks of the same color? (Reduce your answer to the simplest algebraic expression.)

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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A drawer contains n white and n black socks. Each white sock has a
unique design, and each black sock has a unique design. Two socks
are selected at random from the drawer. Every way of selecting the
two socks is equally likely and the order in which the socks are
selected does not matter.
a. How many ways are there to select the two socks? (Reduce your
answer to the simplest algebraic expression.)
b. How many ways of selecting the socks result in two socks of
the same color being chosen? (Reduce your answer to the
simplest algebraic expression.)
c. What is the probability of selecting two socks of the same
color? (Reduce your answer to the simplest algebraic
expression.)
Transcribed Image Text:A drawer contains n white and n black socks. Each white sock has a unique design, and each black sock has a unique design. Two socks are selected at random from the drawer. Every way of selecting the two socks is equally likely and the order in which the socks are selected does not matter. a. How many ways are there to select the two socks? (Reduce your answer to the simplest algebraic expression.) b. How many ways of selecting the socks result in two socks of the same color being chosen? (Reduce your answer to the simplest algebraic expression.) c. What is the probability of selecting two socks of the same color? (Reduce your answer to the simplest algebraic expression.)
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