Answer:
479001600
Step-by-step explanation:
You will want to use 12!.
12*11*10*9*8*7*6*5*4*3*2*1=
479001600
Answer:
If you go by normal method, no. of possible passwords that can be created with 26 alphabets are 26X26X26X26 = 456,976
Step-by-step explanation:
. If you do not want to repeat the alphabets, you can use combinations. i.e. C(26, 4) or 26C4 = 358,800 ways
Answer:
B
Step-by-step explanation:
.
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The Cartesian product of two sets can be defined as the following: the set of all possible pairs where the 1st coordinate is an element of the 1st set and the 2nd coordinate is the element of the 2nd set. This has an obvious generalization for n sets (the cartesian product has then n coordinates).
Let us pick now all the pairs that have 100 as their first coordinate. We then have 2 choices for the 2nd coordinate, 1 and 2. Hence, the 2 pairs are: (100,1), (100,2). Similarly, if 200 is the first coordinate, the pairs are (200,1), (200,2).
These 4 pairs are the cartesian product (we have 4 pairs =2 elements from X* 2 elements from Y) .
It helps to remember that the cartesian product has as many elements as the product of the number of elements of each set.
Answer:
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