[Deleted because this question is from a banned source - see below.] ==========QUESTION ENDS HERE=========== After reading OA I could understand why OG has selected D as OA. But I am not able to understand their explanation for refuting E. So my query is related to E: The aim is to reduce the amount...

BUMP!!
Anyone please. The instructors??

1. Many teenagers undergo stress, but results of a recent study indicate that the patterns of stress that girls experience are more likely to result in depression than are those that boys experience . A. are those that boys experience B. those that boys experience 2. A study published in the British...

For such questions there is a generic formula also:
(Sum of n numbers)*(n-1)! * [10^n-1]/[10-1]

i applied on above question
(24)*(2)*111 = 2664

The set {4, 6, 10, 12, 18} does not follows normal distribution, i.e. the well known bell shaped curve. In normal distribution the bigger values lies in the centre.

One golden rule that i always follow in inequality problem is try removing the unknown variables. In the above question II gives us the opportunity to reduce unknown K to known 3. So lets start with II first: II: y = |x-3|-|x+3| =>Three conditions arises: x>0,x=0,x<0 a)x>0 =>y=(x-3)-(...

our inequality is: (m+x)/(n+x)>m/n We only need to know m and n, sign of x is irrelevant. lets see how. Multiply both side of inequality with n. since n is positive, we do not need to change the inequality. n(m+x)/(n+x)>m similarly, multiplying both side by 1/m n(m+x)/m(n+x)>1 n(m+x)>m(n...

How about the following solution:
Total number of ways in which exactly 3 digits have value 2: 5C3 = 10.
Total number with 5 digits = 9*10*10*10*10 = 90000
Required probability = 10/90,000 = 1/9000

Q I got wrong in the practice exam - can you pls explain this to me? For which of the following functions f is f(x)=f(1-x) for all x a) f(x)=1-x b) f(x)=1-x^2 c) f(x)=x^2 - (1-x)^2 d) f(x)=x^2 (1-x)^2 e) f(x)=x / (1-x) The correct ans was D, but I can't get to this... for faster calculation, take x...

for easy calculation lets say the distance b/w T and S is 40 miles.
So for T->S took 1 hr. That means from S->T took 40 minutes. Now we can caluclate average return speed. So if we have both forward (x) and backward(y) speed, we can easily calcualte avg. speed.(2xy/(x+y))

for x=1/9 and y = 1/16:
question stem gives: Sqrt[1/(25/144)]
=sqrt[144/25]=12/5=2.40

while ii gives 3.XX for x and y.

It is simple calculation. can you please tell your excat doubt.

IMO B.

I is not sufficient.
22 chairs, less than 24 : total cost $31, greater than 30.
25 chairs, more than 24 : total cost $34, greater than 30

I wanted to know why the following approach is wrong; it would give the answeer as A. Overall rate = rate at A + rate at B we can caluclate rate at A since we know the total number of errors as well as the total number of customers. Also, statement I gives overall rate . so , rate at B can be calucl...

8: The composer.........: in.....symphonies. The explanation for this problem says that usage of colon is right here. But i see a semicolon to be better option than colon. Both sentences (before and after colon) can stand independently and yet they are related. Please explain why using semicolon wou...

Option A can be easily kicked out.
The author has no where in the argument explained why fragments contained no sulfur. The second bold face answers the main question of the argument : "... but they did not show how big those fragments were?"