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Managing the Variables

Let me clarify at the onset, that the variables which we are talking about here are not the same as the mathematical variables. Rather, what we mean to say is that the word variable here represents all the entities, be it the name of a place, a person or the days; a book which they might have been reading or practically anything given in the LR set. Additionally there will be some rules or conditions encompassing these variables. And as it is correctly said, “Our variables are our resources”; similarly, we should use the variables given to us in our questions, in the same way.

Understandably, a LR set can have two or more variables. Let us see some examples:

Example 1: Two variable LR set

Six plays, viz., Ram teri Ganga maili, Satya, Don, Bakri.com, Andha Mughal and Angrezo Bharat aao, are to be staged, one on each day starting from Monday to Saturday.

In the above written statement, which can also be the opening statement of an LR set, we see that there are two sets of variables:

  1. Six plays and
  2. Six days as six different positions

Now according to the given conditions, we will be establishing the correspondence between these plays and the days on which they can happen.

Example 2: Three variable LR set

There are five men working in Due North Inc. namely A, B, C, D and E. Their respective salaries are different and they are married to five women namely F, G, H, I and J.

In this situation, there are three sets of variables:

  1. Five men working in an organization.
  2. Their respective salaries which are different.
  3. Their wives, which are of course different.

Before plotting the diagram for the above set, the most important thing to remember here is the fact that we can establish direct correspondence on paper, only between two variables, and so the third variable is to be kept in the mind. Now, to choose the two variables out of the given three variables, we should keep an eye on the rules or the given conditions. The more the conditions related to a particular variable are given, the more the chances are of it being taken as one of those two variables which are to be used in the diagram on the paper.

Example 3: More than three variable LR set

Five men from five different states of India work in a factory and each of them performs a different job. Each man commutes to work using a different mode of transport and most work on different shifts. There are three shifts—1st shift, 9 am–12 noon; 2nd shift, 12 noon–3 pm and 3rd shift, 3 pm–6 pm. All the people working on the same shift come at the same time.

How many variables are there in the above LR set?

Let us count:

  1. 1st variable – five men
  2. 2nd variable – five states
  3. 3rd variable – different job
  4. 4th variable – mode of transport
  5. 5th variable – work-shift

We do understand that most of the time managing fewer variables is easier than managing more variables.

From here we will start with LR sets of two variables and then move on to the LR sets of a higher number of variables.

One thing I would like to reiterate—Please do not just read this book; rather, sit with a pen/pencil and paper and before going through the solution of any LR set, give it a try.

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