bschool_guru

E is correct because of tense ?

E reads as tho "mother" is the eldest child ..

agree with scoot

can you put your question in a better understandable form ? I am sure if you picked up this question from somewhere it was not as unclear ..

Consider each couple as a group. So there are 5C3 ways of selecting. But of these one person needs to be slected from each group. There are two ways of doing that from each group. thus the total number is 5C3*(2x2x2) = 80

C. was a well-established method of mineral extraction -- this is unidiomatic to say "mineral extraction as early as" -- "established" here is not a verb here. D. was a well-established method of extracting mineral that was E. had been a method of mineral extraction, well established -- verb closer to as early as .. The question is : was leaching avilable ("was" ) early as 18th century or was it well-established as early as 18th century ? I think the sentence is trying to say latter and do E meets that and not C. can anyone tell what the OA is ? 800bob -- even C gives an impression that leaching mineral extraction was in the past. Unless you use present perfect you can not really express that it continues in the present. None of the choices do that.

B it is

I would say "E" for the first one .... D doesnt make sense. C is not good because it does not maintian the time line -- using past perfect helps as in E

1. normal -- wrong comparison -- normal is not a grasshopper or insect 2. is normal -- seems correct 3. was normal -- again wrong comparison and "was" 4. they normally are .. "they" ? who they ? Note " A grasshopper" not grasshopperS. 5. they are normally .. same as 4

yes amitraj, I remember that discussion ;-) The answer is B

I almost picked B but it should be D because "have" in B is wrong.

yep. it is the "appositive" after comma

I dont agree with your at least notation. I would say at least [ >= ] at most is [ When I say I want at least 2 apples -- that means I dont mind 3, 4, 5 ..... When I say I want at most 4 apples -- that means you may give me 4, 3,2,1 or none. Agree ?

amitraj you probably missed my point -- I totally agree with the difference between "as great as" and "as great as or greater than" and "greater than". My point was that C is wrong for a different reason than you state. Also, I believe that "at least as great as" is NOT the same as "as great as". I contend that. at least as great as = as great as or greater than ... Or using your example the below sentnces ARE EQUIVALENT: ( X > = tallest person ) X is at least as tall as the tallest person in the class X is as tall as or taller than the tallest person in the class.

shri -- you are right about the rule, BUT "now commonly called" is NOT past tense. "-ed" does not necessarily make things past sentence.

Take heart to this formula : AUBUC = A + B + C - ( A Interserction B ) - ( B Interserction C ) - ( C Interserction B ) - 2*( A Intersection B Intersection C ); in this question A = 66 , B = 45, C = 42 therefore A + B + C = 153 and [ ( A Interserction B ) + ( B Interserction C ) +( C Interserction B ) ] = 27 and ( A Intersection B Intersection C ) = 3 therefore AUBUC = 153 - 27 - 6 = 120 Therefore students who dont play anything = 150 -120 = 30

shri62 .. i dont mean to pick on you but this tone thing is probably not grounded in any GMAT rule .. so you may just incidentally get this question right but may not want to use this "rhyming" rule .. just a suggestion

The ancient Anasazi harvested such native desert vegetation as the purple-flowered bee plant, what they now commonly call wild spinach in northern Arizona and other parts of the southwestern United States. what they now commonly call -- [ They is ambigous .. are Anasazi still around ? what is incorrect usage too .. it should be which ] a plant that they now commonly call [ "they" is a probl ] now commonly called [ I think this is correct ] and is mow commonly called [ C is better. and is not needed ] which it is now commonly called [ "it is" is bad ]

Guys here is a simple derivation of the above formula. This should help. There are two types of moves : Up ( U ) and Right ®. notice that using shaqs terminology, in all there are c+r -2 moves to be done. Of these there are r-1 Up moves ( U ) and c -1 Right moves ( R ). So the question boils down to arranging r-1 Us and c-1 Rs. In total there r+c -2 R/U symbols to be permutated so the number of ways = (r+c-2)!/(r-1)!(c-1)! = (r+c-2)C(c-1) = ( r+c -2)C(r-1) Note all I did was simply plug in the forumula n!/k1!k2!k3! ..kr where k1 k2 k3 .. kr are numbers of r different things in a collection of n things.

C is wrong for a different reason than it is mentioned in this thread here. "as great as or greater than " is as redundant as "at least as great as " the problem is different : penality is not of using the AC, it is the penality incurred while using the AC. The choice C talks about the former sense .. and hence is a wrong comparison

"for maintaining " is Wrong idiomatically .. it has to be "in maintaining" So D is shot Can you tell me what is wrong with C ? I see ambiquity in what it is trying to compare .. cost to cost of products or cost of product to maintainence of product ?

"its 1958 reorganisation" is CORRECT usage. e.g The team scored better than they did in thier 1998 superbowl win. What is wrong with A and will all the other choices is the unidiomatic usage of "broke with .. for deciding" .. the correct usage is "broke with .. in deciding" B, C E have other problems too but not "its 1958 reorgranisation"

it is ok to modify group but instead of which it should have been that ....

thatchanon -- see last line of my first poste to this thread

Guys here is a simple derivation of the above formula. This should help. There are two types of moves : Up ( U ) and Right ®. notice that using shaqs terminology, in all there are c+r -2 moves to be done. Of these there are r-1 Up moves ( U ) and c -1 Right moves ( R ). So the question boils down to arranging r-1 Us and c-1 Rs. In total there r+c -2 R/U symbols to be permutated so the number of ways = (r+c-2)!/(r-1)!(c-1)! = (r+c-2)C(c-1) = ( r+c -2)C(r-1) Note all I did was simply plug in the forumula n!/k1!k2!k3! ..kr where k1 k2 k3 .. kr are numbers of r different things in a collection of n things.