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10 cell phones and 10 numbers (Posted on 2008-06-11) Difficulty: 3 of 5
You are given 10 cell phones and 10 cell numbers(each number corresponds to one of each of those 10 cell phones), but you don't know which number corresponds to which cell phone. Your task is to label each cell phone with its corresponding number. Using optimal procedures, what is the probability that you will finish the task in exactly 5 attempts?

A single attempt is defined as calling a number from a cell phone.

Hint: The caller's number will be displayed in the cell that is being called.

See The Solution Submitted by Praneeth    
Rating: 4.2500 (4 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(5): Solution? | Comment 9 of 10 |
(In reply to re(4): Solution? by Charlie)

After having submitted my post, I see you came to the same conclusion.
  Posted by Dej Mar on 2008-06-11 20:34:04

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