SOLUTION: What are the odds that four people are all born on the same day of the week?

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Question 1019003: What are the odds that four people are all born on the same day of the week?
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
(1/7)^3
or 1 in 343
Why not (1/7)^4 ? That would be the answer if you asked that four people are all born on a particular day, say, Monday. In this case, the first person doesn't matter, so long as the 3 match her.