GMAT Question of the Day (Nov 21): Probability and Critical Reasoning

Math (PS)

If Ben were to lose the championship, Mike would be the winner with a probability of $\frac{1}{4}$ , and Rob - $\frac{1}{3}$ . If the probability of Ben being the winner is $\frac{1}{7}$ , what is the probability that either Mike or Rob will win the championship?

(A) $\frac{1}{12}$
(B) $\frac{1}{7}$
(C) $\frac{1}{2}$
(D) $\frac{7}{12}$
(E) $\frac{6}{7}$

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Verbal (CR)

The cost of transatlantic airfare has nearly doubled over the past five years, yet airlines are doing a booming business. Clearly, people today have more money to spend on vacations than they did five years ago.

All of the following, if true, would weaken the argument above EXCEPT:

(A) Most people buying transatlantic tickets today use them for business trips, so airfare is refunded by their companies.
(B) There are fewer airlines in existence today than five years ago.
(C) People are taking shorter vacations and staying in cheaper hotels than they used to.
(D) Crossing the Atlantic by ship requires more time than most people can afford.
(E) Domestic airline flights have seen a steady increase in passengers

Answers to the questions: C, E
For explanations please see these threads: math and verbal

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GMAT Question of the Day (Nov 21): Probability and Critical Reasoning

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