Question

Choose the correct option for the following question given below:
The classes in which the lower limit or the upper limit is not specified are known as _______________.
A. Open end classes.
B. Close end classes.
C. Inclusive classes.
D. Exclusive classes.

Answer 1

Get the answer by elimination process. Here, we define each and every option given and check if it matches the given question. The one definition or an explanation which matches with the given statement will be the right answer.

Complete step-by-step solution:
Let us go option wise.
Inclusive classes are the class limits which are obtained by subtracting $0.5$ from the lower limit and adding $0.5$ to the upper limit. Basically, the classes for which the lower limit of one class is not equal to the upper limit of the previous class is called inclusive classes. The difference between the true upper limit and true lower limit of a class interval is called the class size. Since, the question asked is not relating to the inclusive classes, i.e., in inclusive classes since the lower limit and upper limit is specified, the option C is not correct.
Exclusive classes are the class form, where the lower limit and the upper limit are known as the true lower limit and the true upper limit of the class interval. Since the lower and upper limit is known, the onion D is not correct as well.
A closed ended class is a class where both the upper limit and the lower limits are closed or bounded together. We are given the limit values so the limits are known. Therefore, the option B is not correct.
Finally, getting back to the open-ended class; an open-ended class is a class in which either the lower limit of the first class is not given or the upper limit of the last class is not given. Here, the limits are not given and are taken in general, it matches the given question.

$\therefore$ The correct option is A.

Note: We have to mind that the trial and error approach is used most successfully with simple problems and in games, and it is often the last resort when no apparent rule applies. This does not mean that the approach is inherently careless, for an individual can be methodical in manipulating the variables in an attempt to sort through possibilities that could result in success. Nevertheless, this method is often used by people who have little knowledge in the problem area. The trial and error approach has been studied from its natural computational point of view.