.
1-st person can go out at any of 10 bus stops - 10 opportunities.
2-nd person can go out at any of 10 bus stops - 10 independent opportunities.
3-rd person can go out at any of 10 bus stops - 10 independent opportunities.
4-th person can go out at any of 10 bus stops - 10 independent opportunities.
5-th person can go out at any of 10 bus stops - 10 independent opportunities.
6-th person can go out at any of 10 bus stops - 10 independent opportunities.
In all, there are different ways.
Same number of ways as how many 6-letter words do exist comprising of 10 given letters (symbols) of the alphabet, if letters repetition is allowed.