Answer:
There are 604,800 possible permutations.
Step-by-step explanation:
The order in which the digits are chosen is important, which means that the permutations formula is used to solve this question.
Permutations formula:
The number of possible permutations of x elements from a set of n elements is given by the following formula:

In this question:
7 digits from a set of 10(10 digits to 0-9). So

There are 604,800 possible permutations.
Answer:
B- 1/4
Step-by-step explanation:
si un cuarto cuarto son ratones y dos otro cuartos con gatos el otro cuarto va hacer perros
No, because you have two y-points that are the same.
I really do not know the answer to this question