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What is the probability of guessing the last digit of a phone number?
Wiki User
∙ 9y ago
It is 1/10.
Wiki User
∙ 9y ago
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What is the probability that a seven-digit phone number contains the number 7?
Best way to answer this question is by figuring out the probability of a phone number not containing the number 7. There are 9 other numbers that are not a 7, so odds of each digit not being a 7 is 90%. For a 7-digit number, calculation would be 0.9*0.9*0.9*0.9*0.9*0.9*0.9 or 0.9^7. This equals 47.8%, which means the odds of a phone number containing at least one 7 is 100% - 47.8%, which is 52.2%. But phone numbers do not begin with 0 or 1, so if we account for that, the odds of the first digit not being a 7 is 7/8, not 9/10. We replace the first 0.9 with 0.875, and the result is 53.5%. There are other scenarios we can take out, like numbers that begin with 555, but I'll just leave it at that.
A complete probability distribution is always an objective listing of all possible events Since it is impossible to list all the possible outcomes from a single event probability distributions are o?
Your question is not clear, but I will attempt to interpret it as best I can. When you first learn about probability, you are taught to list out the possible outcomes. If all outcomes are equally probable, then the probability is easy to calculate. Probability distributions are functions which provide probabilities of events or outcomes. A probability distribution may be discrete or continuous. The range of both must cover all possible outcomes. In the discrete distribution, the sum of probabilities must add to 1 and in the continuous distribtion, the area under the curve must sum to 1. In both the discrete and continuous distributions, a range (or domain) can be described without a listing of all possible outcomes. For example, the domain of the normal distribution (a continuous distribution is minus infinity to positive infinity. The domain for the Poisson distribution (a discrete distribution) is 0 to infinity. You will learn in math that certain series can have infinite number of terms, yet have finite results. Thus, a probability distribution can have an infinite number of events and sum to 1. For a continuous distribution, the probability of an event are stated as a range, for example, the probability of a phone call is between 4 to 10 minutes is 10% or probability of a phone call greater than 10 minutes is 60%, rather than as a single event.
How many digits does a phone number have?
The number of digits in a phone number depends on the county of the number itself. For instance, in the United States, there are typically 10 digits for a number, whether it has an area code or is toll free.
If a digital combination lock on a phone has 4 spaces with digits 0 to 9. How many 4 digit combination lock codes are possible?
104 or 10000
Roles of Probability in different fields of life?
When your driving and you have tow routes you can take, one with red lights that shorter, and one without red lights and is longer. You try and figure out the probability that you will hit the lightes all green and make it sooner, or go the long way and not chance it. Also the chance that you'll be in a meeting and your phone will ring, so do you turn the ringer off or chance it.,,,,,,,,,,,,,,,,Ammar Qasim
What is the probability that a seven-digit phone number contains the number 7?
Best way to answer this question is by figuring out the probability of a phone number not containing the number 7. There are 9 other numbers that are not a 7, so odds of each digit not being a 7 is 90%. For a 7-digit number, calculation would be 0.9*0.9*0.9*0.9*0.9*0.9*0.9 or 0.9^7. This equals 47.8%, which means the odds of a phone number containing at least one 7 is 100% - 47.8%, which is 52.2%. But phone numbers do not begin with 0 or 1, so if we account for that, the odds of the first digit not being a 7 is 7/8, not 9/10. We replace the first 0.9 with 0.875, and the result is 53.5%. There are other scenarios we can take out, like numbers that begin with 555, but I'll just leave it at that.
How do you call the US if you have only 9 digit phone number?
You are missing a digit. Find it.
What is a 4-digit pin?
A 4 digit pin is the last four numbers in your phone number.
How can you buy a 4-digit phone number in US?
yep
What is the probability of meeting someone with a phone number ending with a 5?
Almost 100%, since you meet hundreds of people in your life. For a single person, the probability of the phone number ending in 5 is approximately 0.1.
What is a 4 digit pin?
A 4 digit pin is the last four numbers in your phone number.
If you choose any phone number at random what is the probability the fourth digit will be 6?
It is best to assume independence between the numbers (i.e. the 4th doesn't affect the 5th)If that is true, then the odds are .1(We don't have to worry about area codes exist, or about avoiding 911, since this is the 4th digit)
Can a ten-digit phone number be a legitimate seven-digit number without the last three digits?
No, a 10-digit phone number that is missing the last three digits can not be a legitimate number. In order for a number to work, it must have 3 numbers for an area code and seven digits for the phone number itself. Some telemarketers are now using fake numbers to hide from the people they're calling.
Do all phone numbers end in a odd digit?
No, my second to last phone number ended in 3836.
How do you hard reset kyocera rio?
Press ##786. Be careful as your phone will be completely reset. Once it reboots you will have to reprogram your 10 digit phone number into the phone. This can be done by dialing ##000000# on your phone and then select the edit mode and in both fields enter your 10 digit cell phone number. Enjoy!
How many digit is fax number?
a fax number is just the same as a phone number so the same number of numbers
How many different 7 digit phone number are possible if the first digit cannot be 0?
9*106 or 9 million.
