SOLUTION: a. How many ways can 6 passengers be lined up to get on a train? b. If a certain persons insist on following each other, how many ways are possible?

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Question 635064: a. How many ways can 6 passengers be lined up to get on a train?
b. If a certain persons insist on following each other, how many ways are possible?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

a. How many ways can 6 passengers be lined up to get on a train? 6%21+=+720 ways

b. If highlight%28a%29 certain persons insist on following each other, how many ways are possible?

1) think of the highlight%28a%29 persons as one unit (they themselves can be arranged a! ways)

2) then the units to arrange typically would be (6-a)

 a%21%286-a%29%21 ways this can be done