Since the mid-1960s, the incumbent reelection rate has never dropped below what percent in the Senate? A 60% B 65% C 75% D 80% E 90%
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Consider the following table of ages of U.S. senators: What is the probability that a senator is under 70 years old given that he or she is at least 50 years old? A. 0.580 B. 0.624 C. 0.643 D. 0.892 E. 0.969
Jason H.
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Consider the following table of ages of U.S. senators: $$\begin{array}{|l|l|l|l|l|l|l|}\hline \text { Age (yr): } & <40 & 40-49 & 50-59 & 60-69 & 70-79 & >79 \\\hline \text { Number of senators: } & 5 & 30 & 36 & 22 & 5 & 2\\\hline\end{array}$$ What is the probability that a senator is under 70 years old given that he or she is at least 50 years old? (A) 0.580 (B) 0.624 (C) 0.643 (D) 0.892 (E) 0.969
Probability, Random Variables, and Probability Distributions
Quiz 15
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