Sachin9 wrote:
Sir Bunuel,
Could you please provide an alternate soln to 1 without picking smart numbers?
Regards,
Sach
Q1) Answer E
make a grid like this
------------------------------------------------------Night---------------day
No. of workers------------------------------------(4/5)y---------------y
No. of boxes loaded by each worker ----------(3/4)x-----------------x
Total No of boxes loaded ----------------------(4/5)(3/4)xy-------xy
Now we are asked ratio of TOTAL NO OF BOX LOADED DAY / (TOTAL NO OF BOX LOADED DAY + TOTAL NO OF BOX LOADED NIGHT)
XY/(XY+(3/5)XY) ----------> (XY/1) / (8XY/5) --------> 5/8 ----------> E
Q2) Answer C
I) in 2x-5 if x increase by 1 then equation will be 2(x+1)-5. If x is positive the equation will increase by 2 and if x is negative the equation will decrease by 2. We are given in ques that x increased from 165 to 166 that means x is positive so the equation will increase by 2. Eliminate B and E
II) 1-(1/x) now this equation will increase if 1/x decrease and 1/x will decrease if x increase. x is increased so this equation is also sure to increase. Eliminate A. Now Option D will also get eliminated because it does not contain II, so from here we do not need to proceed to check III. The correct choice is C. However for the study part we will check III
III) 1/(X^2-x) -------> 1/x(x-1) -------> we know as denominator increased the fraction decreases. in this case with the increase in x the denominator increases and the fraction decreases. so this equation will not increase with an increase in X.
Regards,
Abhijit
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