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Probability
The probability of a certain event is a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences. In mathematics, it is a measure of how often an event will happen and is the basis of statistics.
14,643 Questions
What is the probability of people playing video games?
The answer will depend on people's access to gaming machines and to video games, the demographics of the wherever you are studying and whether or not the people have a life!
What is the probability of tossing a sum of 7 on two number cubes with faces numbered 1 through 6?
The probability is 1/6.
Why is probability theory important?
Very many events in daily life are uncertain. Or, given the amount of information that we can collect and process in real time, they may as well be random. The daily weather, the gender of a child when conceived, whether or not you hit a red light two miles down the road, whether the next chip made is faulty and so on. Some things are truly random - such as physics at the quantum level. Probability theory allows you to put some measure on the degree of uncertainty and work out how likely different outcomes are so that, in some case, you can plan around those uncertainties.
What is the probability that a seven-digit phone number has one or more repeated digits?
Assuming all digits are equally likely, then it is 0.9395.
However, that assumption is flawed since some numbers begin with 0. Some sequences are reserved and so on. So the distribution of numbers is NOT truly random and the above answer depends on all seven digit numbers being equally likely..
The probability is 71/489 = 0.145, approx.
If measurements are taken for two (or more) variable for a sample , then the correlation between the variables are the sample correlation. If the sample is representative then the sample correlation will be a good estimate of the true population correlation.
What does the 10 percent tornado probability from the spc typically mean?
Such an outlook is categoriezed as a slight risk.
Tornado activty in such an instance can vary quite a bit as such outlooks come with a high degree of uncertainty. To a large degree what is likely to happen depends on the area covered. Such outlooks often indicate a few tornadoes, some of which may be strong, can occur, especially if there is a hatched area included. In some cases a moderate tornado outbreak may occur. Sometimes there is potential for one or two violent tornadoes. Again, though, as there is a high degree of undertainy in many cases, sometimes the forecast tornadoes fail to develop.
DJ is the short form and now general usage for Disc Jockey.
Can getting hit in the head cause a brain aneurysm?
A blow to the head can cause a brain aneurysm, but this cause is only 1% of all cases, so it's unlikely.
What is the probability of drawing two 10s in card deck?
Clearly, it is necessary to draw at least two cards. How many are drawn? Are the cards drawn at random? Is the first replaced before drawing the second?
Please edit the question to include more context or relevant information.
What is the probability of not getting a consecutive 2 when the dice is roll 5 times?
It is 0.9034, approx.
What is the probability of drawing two black kings from a standard deck of 52 cards?
The probability depends on:
- whether the cards are drawn randomly,
- how many cards are drawn, and
- whether the cards are replaced before drawing the next card.
If only 2 cards are drawn randomly, and without replacement, the probability is 0.00075 approximately.
When two coins are tossed simultaneously what is the probability of obtaining at most one head?
The probability is 3/4.
What probability is there of finding another earth?
Considering the number of stars in each galaxy, and the number of galaxies that
exist in the universe, and the emerging conjecture that as many as 75% of all
stars have planets, the probability of the EXISTENCE of another planet somewhere
that is almost identical to Earth is very high.
BUT . . . considering the distances involved, and the difficulty of detailed observations
and measurements of an object that appears to us to be about the same apparent
size as a grain of sand on the surface of the moon, the probability of our FINDING
it is minuscule.
What is the probability that all four cards are seven?
The answer depends on whether the question is in the context of a deck of playing cards or some other collection, whether or not the cards are replaced after picking, whether the cards are selected at random. Since there is no information on any of these aspects, it is not possible to give a useful answer to the question.
Will a win lottery numbers will come up again?
The probability of a certain set of numbers coming up in the lottery is equal to the probability of any other set of numbers coming up. Just because a certain set of numbers came up, that does not mean that the same set of numbers is more or less likely to come up again.
The answer depends on how many rolls.
If there were n rolls, then the probability is n*(1/6)*(5/6)n-1/[1 - (5/6)n]
What is the probability that Lenny's birthday is in a month starting with the letter M?
If you assume, incorrectly, that birthdays are distributed uniformly across months, then the answer is 2/12 = 0.166... recurring.
How do you convert a percentile to a probability?
If the random variable X has x as its nth percentile, then Prob(X<=x) = n/100.
How do find the probability that it will rain or snow in a given day?
The simplest - and not very useful - method is to establish how many days in the year it rains or snows. Then that number, divided by 365 (or 365.25) is the probability that it will rain or snow on a given day.
You can improve on that estimate by considering data for only the days on which it rained or snowed during the relevant month in previous years. Further refinement can come from looking at what the weather was like on the previous day, previous 2 days and so on. Yet another improvement is to look at what is happening upwind from your location. Each refinement requires more information to be processed but improves your forecast. The trade-off is reached when the marginal cost and time spent in collecting and processing any additional data is just equal to the marginal benefit obtained from an improved forecast.
