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GMAT Probability

by ejkiv


July 19, 2015


The reason that we covered combinations and permutations before GMAT probability is that the more difficult probability problems will use these concepts. Probability measures the likelihood that something will happen and will be measured in fractions or decimals. This is always expressed with a number that is between 0 and 1 inclusive. The foundation of probability comes from this equation: If you flip a coin, the probability of getting heads is .5 because there is one outcome out of 2 pos...

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GMAT Functions

by ejkiv


July 19, 2015


GMAT functions are really just fancy ways to write out equations. There is no reason for you to be scared of this question type (I know I sound like a broken record on this, but it is true). Functions look like this: f(x)= x+1 This pronounced ‘f of x equals x plus 1.‘ Really, you can think of the f(x) portion of this as you would the variable y in a linear equation. The main difference is that the value inside the parenthesis will tell you what to plug into the x variable. So, for this func...

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GMAT Symbolism

by ejkiv


July 19, 2015


Symbolism tends to be ominous only because of people’s lack of confidence. When an unfamiliar symbol is thrown into the mix, people think that they missed something along the way. The key point here is that when you see a symbol it has no meaning outside the context of the question in which it was given. You will see something like this: All you need to do is act in a similar fashion to the function problems we just discussed and plug the 4 in where the x was and the 3 where the y was. Not...

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GMAT Sequences

by ejkiv


July 19, 2015


The way that GMAT sequences are written is what tends to make them most difficult for people. Once you get this part down, you will be in good shape. If we look at a basic sequence: 2, 4, 6, 8, 10, 12 ..... We could write this sequence like this: Basically, the subscript is simply a term number and we could write the equation for this sequence as follows: This is not terribly different from functions at this point; for whatever term number you are looking for you just plug that term n...

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GMAT Permutations and Combinations

by ejkiv


July 19, 2015


Permutations and combinations are two areas that most students do not want any part of, but as you will see it is really about developing a true understanding of what the formulas represent instead of memorizing the formulas. In all reality, in this section more than any other, I will encourage you to throw out the formulas used to calculate the solutions. First, let’s define what the difference between a combination and a permutation is exactly. Combinations and permutations are both ways t...

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GMAT Advanced

by ejkiv


July 16, 2015


There are many parts of everything that we have covered thus far that are just as advanced as the topics that are going to be covered in this GMAT advanced section. However, on the whole the contents of the following sections tend to show up more frequently in the higher level questions. Not to say that you cannot get an easy question from the following topics; it is just less likely. It is the variations of these topics that make them difficult Even if you are not aiming for 760+, thi...

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