Specific Student Queries-Quant(All topics)

Contains specific doubts/queries posted by students

Standard Deviation(Is Standard Deviation affected with sign)???
SD is a measure of spread and in other words how close or distant the data are from the mean. So, yes for SD to be same for -p,-q,-r as for a p,q,r. ...
Tue, 12 Oct, 2021 at 12:04 PM
If r(r+s) ≠ 0 and r > 0( E or B??)
St 1-Though r+s is positive, we do not know of the sign of s and hence the conclusions can be YES/NO(Insufficient)   St 2- With s>0 and given r>0,...
Tue, 12 Oct, 2021 at 12:06 PM
(Which one is a Middle Class family?)B or D???
We can see that Median/2 < Middle class income < 2*Median      - In statement 2 we have minimum income given as  $18576.      - This according to th...
Tue, 12 Oct, 2021 at 12:06 PM
Which of the following has the same standard deviation as {s, r, t}?(Is SD of s,r,t same as -s,-r,-t concept?)
SD is a measure of spread and in other words how close or distant the data are from the mean. So, yes for SD to be same for -p,-q,-r as for a p,q,r. We...
Tue, 12 Oct, 2021 at 12:07 PM
If r(r+s) ≠ 0 and r > 0( E or B??)
St 1-Though r+s is positive, we do not know of the sign of s and hence the conclusions can be YES/NO(Insufficient)   St 2- With s>0 and given r>...
Tue, 12 Oct, 2021 at 12:07 PM
Why is power of 0 not used in Prime Factorization?
Coming to what you asked-Prime Factorization essentially implies writing a number as a product of its prime factors only. If we say 25 can be written as 2^...
Tue, 12 Oct, 2021 at 12:08 PM
A boat traveled upstream 90 miles at an average speed of (v-3) miles per hour and then traveled the same distance downstream at an average speed of (v+3) miles per hour. If the trip upstream took a half hour longer(Is there any short cut??)
CONCEPT: The question uses the application of Speed Time Concepts with Relative Speed as a major area of focus here. The distance downstream is 90 miles...
Tue, 12 Oct, 2021 at 12:08 PM
Which of the following equations has 1 + √2 a Need shortcut
Concept: The question tests on your ability to quickly and accurately eliminate the incorrect options. Solution: option (b) and option(c) are expand...
Tue, 12 Oct, 2021 at 12:08 PM
How to improve on the mini GMAT tests?
Pls note the following observations: (1)There needs to be a balance between time and accuracy. One cannot be sacrificed for the other.  Going by the co...
Tue, 12 Oct, 2021 at 12:08 PM
x=(-2,0) & y = (0,-1), the slope is different (Intercept or Distance)
Concept: Doubt of intercept and distance Solution: When we say x intercept is -2 we are using the value of -2 and not the absolute value. That way -2 is ...
Tue, 12 Oct, 2021 at 12:08 PM