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15. In the "secret" lock on the common axis are four disks, each of which is divided into five sectors, on which the numbers are written. The lock opens only if the disks are mounted so that the numbers on them make up a certain four-digit number. Find the likelihood that when installing disks randomly, the lock will open.

15. In the "secret" lock on the common axis are four disks, each of which is divided into five sectors, on which the numbers are written. The lock opens only if the disks are mounted so that the numbers on them make up a certain four-digit number. Find the likelihood that when installing disks randomly, the lock will open.

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 31E
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15. In the "secret" lock on the common axis are four disks, each of which is divided into five sectors, on which the numbers are written. The lock opens only if the disks are mounted so that the numbers on them make up a certain four-digit number. Find the likelihood that when installing disks randomly, the lock will open.
Transcribed Image Text:15. In the "secret" lock on the common axis are four disks, each of which is divided into five sectors, on which the numbers are written. The lock opens only if the disks are mounted so that the numbers on them make up a certain four-digit number. Find the likelihood that when installing disks randomly, the lock will open.
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