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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

Are fraternal twins never the same sex?

Fraternal twins can be the same sex or opposite sexes. It doesn't matter.

What is the probability of drawing a face card or a queen from a 52 card deck?

Since the probability of both events is not mutally exlcusive (you could draw both at the same time), the probability is:

P(queen)+P(face)-P(both)

(4/52)+(12/52)-(4/52)

12/52, which is a bit less than 0.25

What is the probability as a percentage that in 5 years both X and Y fail X1 in 40 chance and Y 1 in 140 chance?

Assuming without any justification, that X and Y failing are independent events, then the probability that both X and Y fail within a 5-year period is approx 15%.

What does the probability of a independent event that is likely to happen?

It is a real number between 0.5 and 1. Whether or not it is independent makes no difference to this answer.

What is the probability that a coin lands heads up on three consecutive tosses?

For each toss, the probability that it'll land heads up is 1/2

So 1/2 * 1/2 * 1/2 = 1/8, or .125

There is a 12.5% chance that it will land heads-up all 3 times.

How do you make a dice game with actionscript 3?

Multiple ways:
1. Learn as3, then make a dice game
2. Go to google, search for dice games, find one, steal it.

That's a question better asked in pieces and other places, but ill start you off.

Math.round((Math.random() * (6 - 1)) + 1);
//pseudo-random number between 1 and 6

What is the difference between t-distribution and standard normal distribution?

the t distributions take into account the variability of the sample standard deviations. I think that it is now common to use the t distribution when the population standard deviation is unknown, regardless of the sample size.

The application of probability and statistic in the field of information technology?

statistics is used in the various fields.

for example:

banking

business

physical sciences

natural sciences

marketing

research

computer science

economics

physics

and many more

What are the possible outcomes if three coins are tossed and die is rolled?

There are 48 possible outcomes and I have no intention of listing them all.

They are all of the form CCCD

where C = H or T, and D takes the numeric values from 1 to 6.