Skip to main content

GRE 23- (The average of five consecutive integers starting from m) – (the average of six consecutive integers

By
(The average of five consecutive integers starting from m) – (the average of six consecutive integers
starting from m) =
(A) –1/4
(B) –1/2
(C) 0
(D) 1/2
(E) 1/4
Choose any five consecutive integers, say, –2, –1, 0, 1 and 2. (We chose these particular numbers to
make the calculation as easy as possible. But any five consecutive integers will do. For example, 1, 2, 3, 4,
and 5.) Forming the average yields (–1 + (–2) + 0 + 1 + 2)/5 = 0/5 = 0. Now, add 3 to the set to form 6
consecutive integers: –2, –1, 0, 1, 2, and 3. Forming the average yields
(−1+ (−2) + 0 +1+ 2 + 3)/6=([−1+ (−2) + 0 +1+ 2]+ 3)/6=([0]+ 3)/6= 
since the average of –1 + (–2) + 0 + 1 + 2 is zero, their sum must be zero
3/6 =1/2
(The average of five consecutive integers starting from m) – (The average of six consecutive integers
starting from m) = (0) – (1/2) = –1/2.
The answer is (B).
Labels:

Comments

Post a Comment

Popular posts from this blog

GRE 37-Verbal Question 8-15

By Unknown
Comparative historian Marc Ferro claims that the largest discrepancy in knowledge between what academic historians and what the aver- age citizen knows about history is found in the United States. How has this situation come about? Certainly the problem does not lie with the secondary literature. Whereas in the past. American historians were handicapped by sec- ondary literature that was clearly biased towards a European viewpoint, since the civil rights movement of the 1950s and 60s. the secondary literature in American history has become far more comprehensive. And it cannot be simply a matter of space constraints; the average high school history textbook is well over a thousand pages in length. One theory holds that American history text- books are simply the socializing instruments of a controlling elite. The stratification of American society is preserved. according to this theory. by the creation of what Marx termed “false consciousness." The theory ho...
Post a Comment
Read more

GRE 32- Verbal Question 2

By Unknown
Question 2 Contemporary authors are much more at liberty to be candid than were authors of previous centuries, but modern writers nevertheless often find themselves _______ portions of their works. A-emancipating B-censoring C-refuting D-censuring E-ameliorating F-expurgating
Post a Comment
Read more

GRE 29- Quantity A Quantity

By
Quantity A                                                    Quantity B 35,043 × 25,430                                     35,430 × 25,043 A)The quantity in Quantity A is greater. B)The quantity in Quantity B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.
Post a Comment
Read more