Math
Mike has to take five tests containing 80 questions each. If after completing four tests, Mike has an average of 80 percent of correct answers, what is the least number of questions Mike needs to get right in the fifth test to bring his average to 82% ?
A. 70
B. 72
C. 75
D. 78
E. 80
Question Discussion & Explanation
Correct Answer - B - (click and drag your mouse to see the answer)
Verbal
There is a great deal of geographical variation in the frequency of many surgical procedures—up to tenfold variation per hundred thousand between different areas in the numbers of hysterectomies, prostatectomies, and tonsillectomies. To support a conclusion that much of the variation is due to unnecessary surgical procedure, it would be most important to establish which of the following?
(A) A local board of review to each hospital examines the records of every operation to determine whether the surgical procedure was necessary.
(B) The variation is unrelated to factors (other than the surgical procedures themselves) that influence the incidence of diseases for which surgery might be considered.
(C) There are several categories of surgical procedure (other than hysterectomies, prostatectomies, and tonsillectomies) that are often performed unnecessarily.
(D) For certain surgical procedures, it is difficult to determine after the operation whether the procedures were necessary or whether alternative treatment would have succeeded.
(E) With respect to how often they are performed unnecessarily, hysterectomies, prostatectomies, and tonsillectomies are representative of surgical procedures in general.
Question Discussion & Explanation
Correct Answer - B - (click and drag your mouse to see the answer)
Like these questions? Get the GMAT Club Quizzes and CAT’s
