There are 6 ways the president can be chosen. Assuming the vice-president must be a different person, there are then 5 possibilities for that office. The total number of possible choices is ...
6 × 5 = 30
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Each of the 6 president choices can have any of 5 different vice-president choices.
Well there is a time difference between Korea and Colorado. So when the man leaves Korea it is 4:30 pm but when he reaches Colorado the next day, it is 4:15 pm. I hope this helps you!
