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11 Mar 2009, 00:16
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25. John wrote a phone number on a note that was later lost. John can remember that the number had 7 digits, the digit 1 appeared in the last three places and 0 did not appear at all. What is the probability that the phone number contains at least two prime digits?
a) 15/16
b) 11/16
c) 11/12
d) ½
e) 5/8
----------------------------------------
The answer is 11/16, but I cant seem to get it using bernouli theorem:
P^s(1-P)^n-s nCr
Words: Prob of success x 1 - prob of failure x combinations
Can someone please solve using this method or show me a simpler way and please dumb it down... Cheers
a) 15/16
b) 11/16
c) 11/12
d) ½
e) 5/8
----------------------------------------
The answer is 11/16, but I cant seem to get it using bernouli theorem:
P^s(1-P)^n-s nCr
Words: Prob of success x 1 - prob of failure x combinations
Can someone please solve using this method or show me a simpler way and please dumb it down... Cheers
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
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11 Mar 2009, 07:50
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25. John wrote a phone number on a note that was later lost. John can remember that the number had 7 digits, the digit 1 appeared ONLY in the last three places and 0 did not appear at all. What is the probability that the phone number contains at least two prime digits?
Try now... you will get the answer you are looking for
Try now... you will get the answer you are looking for
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
