2 sets are different?

If A and B are two sets, we define their symmetric difference as the set of all elements that belong to A or to B, but not both A and B, and we denote it by A D B. Thu..

A number lock has 9 different digits. A combination of two different digits can be set to open the lock. How many combinations are possible? => 81 or 72 or 63 or 18..

Select the correct statement/statements. 1. A line is a set of points that extends in two opposite directions without end. 2. Lines of different sizes have different thickness. 3. A line is of finite length 4. A line is a straight one-dimensional fi..

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>- The difference of two sets A and B, in this order, is the set of all those elements of A which are not in B. - The symmetric difference of two sets A and B is defined as the union of the sets A - B and B - A. Importa..

Let A and B be two non-empty sets, then the cartesian product of A and B denoted by A x B = {(a, b) | a A, b B..

P & R washing machine manufacturing company conducted tests on different models of washing machines before launching them into the market to know the weights (in kgs) they can withstand for a particular drum size. The results are 6, 5.5, 7, 8, 6.3 and 7.2. Find the standard devi..

Which two rectangles have the same area but different perimeters? => Figure 1 and Figure 4 or Figure 3 and Figure 4 or Figure 2 and Figure 3 or Figure 1 and Figure 2..

Find the difference between the times in the two clocks. => 4 hours and 12 minutes or 9 hours and 12 minutes or 3 hours and 20 minutes or 4 hours and 40 minutes..