SOLUTION: In a room of 57 persons, a percentage will have the same birthday. Determine percentage. Not sure how to solve.

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Question 1195440: In a room of 57 persons, a percentage will have the same birthday. Determine percentage.
Not sure how to solve.
Found 2 solutions by ikleyn, greenestamps:
Answer by ikleyn(52803)   (Show Source):
You can put this solution on YOUR website!
.

The problem's formulation in your post is INCOMPLETE.

To start learning this subject, look into the lesson
    - Coinciding birthdays
in this site.

Answer by greenestamps(13200)   (Show Source):
You can put this solution on YOUR website!

Rather than being incomplete, as stated by the other tutor, the statement of the problem is defective.

It is possible for 57 people in a room to have all different birthdays, or to have all the same birthday. So the question as posed can't be answered.