GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
A combination lock has three dials, each consisting of a sin
[#permalink]
29 Oct 2017, 02:19
29 Oct 2017, 02:19
00:00
Question Stats:
89% (01:05) correct
10% (02:06) wrong based on 19 sessions
Hide Show timer Statistics
A combination lock has three dials, each consisting of a single digit, 0-9. The lock can be opened only if each dial is in the correct position. If the code for the lock consists of three prime numbers, what is the probability that 252 is the code? (Provide answer in fraction form).
Enter your value
Kudos for correct solution.
Enter your value
Show: :: OA
1/64
Kudos for correct solution.
Re: A combination lock has three dials, each consisting of a sin
[#permalink]
30 Oct 2017, 10:02
30 Oct 2017, 10:02
2
The prime numbers made of 1 digit are 2, 3, 5, 7. Thus, for each dial of the code there are 4 choices so that the number of possible codes is 4*4*4 = 64. Thus, the probability of one specific code out of 64 possible codes is 1/64.
gmatclubot
Re: A combination lock has three dials, each consisting of a sin [#permalink]
30 Oct 2017, 10:02
Moderators:
