Sets & Statistics

Today, let’s take a look at the concepts of three overlapping sets. Look at the diagram given below. Set A = Set B = Set C = Elements belonging to exactly one set = Elements belonging to exactly two sets […]

We know what data is necessary to calculate the standard deviation of a set, but in some cases, we could actually do with a lot less information than the average test-taker may think they need. Let’s explore this idea through an example GMAT data […]

Today, we have a very interesting statistics question for you. It is based on statistics concepts such as mean, median, range etc. This question needs you to apply all these concepts but can still be easily done in under two […]

Process of elimination is only next to number plugging in popularity as a strategy for solving Quant questions on the GMAT. I am not a fan of either method. Yes, they are useful sometimes, and even necessary in some questions […]

Today, we will discuss the concept of sampling. People with a statistics background will be very comfortable with it, but if you have not studied statistics, a little bit of knowledge will be helpful. You are not required to know this for […]

Today, we will give you a challenge question. The challenge of reviewing this question is not that the question is hard to understand – it is that you will need to solve this official question within a minute using minimum […]

Let’s discuss an advanced averages concept today. Say, you have the following set of consecutive integers: 2, 3, 4, 5, 6, 7, 8 What is the average of this set? There are 7 consecutive integers here and the average is […]

Sets is a topic with very simple fundamentals but could give us some very difficult looking questions. Let’s take a look at one such question today. Question: A group of people were given 2 puzzles. 79% people solved puzzle X […]

What would you Choose – Mean or Median? Hypothetically speaking, given a choice between a question on median or one on mean, which would you choose? (not that we are fortunate enough to have a choice but no harm in […]