The following table shows a breakdown of the 116th U.S. Congress by party affiliation. (There are two independent senators included in the count of Democratic senators. There are two vacant House seats.)

a. A member of Congress is selected at random. What is the probability of selecting a Republican?

b. Given that the person selected is a member of the House of Representatives, what is the probability he or she is a Republican?

c. What is the probability of selecting a member of the House of Representatives or a Democrat?

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Party Democrats Republicans Independent Total House 235 198 433 Senate 45 53 2 100 Total 280 251 2 533