self doubt aptitude

Question

if  i consider that x=-2, y=1

neither statement 1 is giving correct answer nor statement 2 

shouldn't answer be d??

Comments

i think b is the answer.

if(y>0) S1 gives yes. else no.

if(x<0) S2 gives no. else yes.

applying both of them, we get to know the sign of x and y, and hence the sign of xy.

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yes its the correct explanation bt i seriously did not get it

pls explain again

pls tell me whats the approach of these questions,because i always give wrong answer of these questions!!

i was thinking it like this

if x=-2,y= 1 then xy<0 yes

x²y³<0 no

xy²>0 no 

therefore both are not able to tell whether xy<0 or not

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See its simple....Dont take values just observe statements and you will get the answer.

Now, Observe first statement---X^2y^3<0...it will be possible only when Y<0 (because of odd power of y, we cant comment on sign of X since it has even power).

now observe 2nd statement it says XY^2>0...that will be possible only when X is >0( we already got the idea abt Y from first statement right?)

Now come to Question, It says is XY less than 0..and its true if you crosscheck results of above two statements.

so option B is correct, bcuz the conclusion would'nt be possible without the help of above two statements and we know that both these conditions are sufficient to answer the question.

I hope you got it now...:)

Answer 1

B answer is right