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For CR i think its C cause statement C has no relevence to pasaage, rest all some or the other way weeken the argument. For Problem solving again i suppose the right ans is C there is a four digit no. and 2 4s can be put in 5C2 manner which is 10. hope i am right

in CR (A) The honeybees native to Brazil are not of the same variety as those most frequently used in the commercial beekeeping industry in the United States.—this weakens because it counters the basic assumption that native bees are same in us and brazil

(B) Commercial honey production is far more complicated and expensive with Africanized honeybees than it is with the more docile honeybees common in the United States.—it weakens as it states that it is not economical to switch the bees

(C) If Africanized honeybees replace local honeybees, certain types of ornamental trees will be less effectively pollinated.—arbit ..

(D) In the United States a significant proportion of the commercial honey supply comes from hobby beekeepers, many of whom are likely to abandon beekeeping with the influx of Africanized bees.—this weakens because it sys ppl won’t keep african bees

(E) The area of Brazil where the comparative study was done is far better suited to the foraging habits of the Africanized honeybees than are most areas of the United States.—it weakens because it says the study conducted is not valid wrt usa environment

hence for cr the answer is C because ornamental trees are out of context and they don’y weaken the main conclusion in the passage..

for the PS problem

2_0_0_2 there are 5 places where we can fit in the 4s if 4s appera together i.e. 442002.. there are 5 ways to do it if number is of the form 4_4 then there are 4 gaps to fill if it is of the form 4_ _ 4 there are 3 gaps if it is of the form 4_ _ _ 4 there are 2 gaps if it is of the form 4_ _ _ _4 there are 1 gap In total there are 5+4+3+2+1 = 15 ways to do it hence the answer is option D

CR—-c PS—-d

CR—> C PS—> D

cr-b

CR-A

PS-D

I Agree with i_m_wat_i_m’s answers. Answer for CR is ( C ) as it is the only statement that has no relevance to the passage, rest all are weakening the argument. For PS there are 5 places to be filled with 2 4s’, hence it is 5C2 ways i.e 10 ways.

cr-D pr-D

cr-c.. as for ds- one 4 can be first digit, then sec 4 has 5 places to fill eg 442002,424002,420402,420042 and 420024 lly when first 4 takes second digit posn, sec 4 can take 4 places total=5+4+3+2+1=15 .. as both digits are 4 we dont require to multiply it by 2..

CR – D, PS – C.

Having seen the logic given by chetan2u, it seems anser is 15 i.e (D).

Because the 5 places at 2_0_0_2 to fill with two 4S’ in 5C2 ways ensures two 4s’ always seperated by digits among 2,0,0,2. However, the possibility of two 4s’ together is left out. Two 4s’ together can be filled in 5 places by 5C1 ways i.e 5 ways. So total is 15 ways. Thanks Chetan2u for correcting.

I request Suresh bala to explain ant easy tip for such problems. Because the methodology applied by Chetan2u is differenct from what I applied, though the answer arrived is same.

CR – B

PS – D

5 places r dare and two 4 so 5p2/2 as two 4s are alike so ans iz 10!!!!!!

critical reasoning-A, problem solving -D

CR-C,PS-D

Problem solving: – I think all the answers are wrong. Mary has typed all the six digits, she hasn’t forgotten to type 4, but the typed 4 didn’t show. the typed 4 can’t be in the positions between the seen 4 digits namely 2002. if 4 from middle is missing then it would have looked like2 002, or something like 20 02 or any other combination. the missing digit 4 has to be either before 2002 or after that. The possible combinations are two 4s before, two 4s after or one 4 before & one 4 after. So the answer is only 3 combinations are possible.

Hi SureshBala,

Could you pls help me in solving the problem 2x-5y+3z=0 4x-10y+3z=-13 x+3y+10z=-14 using Gauss Seidal method