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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 drawing a heart or a king in regular deck of playing cards?

P(Heart) = 13/52

P(King) = 4/52

P(Heart and a king)= 1/52

P(Heart or a king)=P(Heart) + P(King) - P(Heart and a king)

=13/52+4/52-1/52

=16/52

How do you solve Two cards are chosen at random from a deck of 52 cards without replacement What is the probability that the first card is a jack and the second card is a ten?

The probability that the first card is a jack is 4 in 52. The probability that the second card is 1 ten is 4 in 51. Since these are sequential events, simply multiply, giving (4/52)(4/51) or (16/2652) or about 0.00603.

What is the purpose of probability distribution?

A probability distribution links the probability of an outcome in a statistical experiment with the chances of it happening. Probability distributions are often used in statistical analysis.

What is the probability of drawing a 9 or a jack in a deck of 52 cards?

There are four 9's and four jacks. If you can use all of them, you can use 8 out of 52 cards.

The probability of drawing one of these cards is therefore

8/52 = 0.1538 or a 15.38 % chance.

Does normal distribution have two unequal parts?

It can do. If you define a quarter of it as one part and the rest as another, the two WILL be different! But the distribution IS symmetric about its mean.

Why does the probability of an event have to be between 0 and 1?

Probabilities are expressed as ratios, or more accurately, fractions. If an event will probably occur 1 time in 10 trials, its probability is 1/10, or 0.1. If the event happens every time (10 in 10, for example), the probability is 10/10 = 1.0. You can never have more than n occurrences in n trials. Conversely, if the event never occurs in 10 trials, its probability is 0/10 = 0.0. An event cannot occur fewer than 0 times. This is why the lower and upper bounds of all probabilities are 0 and 1, respectively.

What is the probability of being dealt a queen or club?

The answer depends on how many cards are dealt to you. And since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.

What is probability of rolling a sum of 3 with a pair of unfair dice with probability of 1 and 2 at 18 and the rest at 16?

The probability of any event MUST be a number between 0 and 1. It is not possible to have a probability of 18 or 16.

Furthermore, given that the dice are not normal, the question should also specify how many faces they have and what numbers are on these faces.

What is the purpose of summarising ther outcomes of the conversation before ending a call?

When you are talking to someone for a quite a time,especially if you are discussing various options,it is easy to lose track of what was decided or agreed.Summarising the outcome of a telephone conversation before you ring off helps to overcome that.

How is probability related to genetics?

Probability and genetics go hand in hand. Mendel in his charts showed the probability of dominant and recessive genes being passed on to offspring. The desired trait could be cultivated knowing the probability of inheritance.

What is tossing someone off?

Mainly used as a act towards men. It is masturbating the male, with use of hands. A synonym includes handjob

What are the chances of getting in the nfl?

Well, it depends what team you would like to join. If the team is struggling for players, then obviously it will be much easier to get on the team. Keep your eye out for tryouts and maybe do a bit of internet research on it. I want to be on American Idol, so I found out where the tryouts are. Also, practice football a LOT.

Who use stratified sampling?

A statistician, or anyone who wants to ensure that, for a population that can be divided into a set of strata, the sample is forced to contain the same proportion from each stratum.

Why certainty is important?

If we are certain of what we know then we become solid and sure on the actions that we do....a knowledge that is founded and based on certainty is not a thithered knowledge. Hence a knowledge that is bot back up with certainty makes man's decison ad action unstable and not even credible

What is probability of rolling doubles with 2 dice 100 times?

The probability of rolling doubles with 2 dice is 1 in 6, or about 0.1667. The probability of doing that 100 times in a row is 0.1667100 or about 1.531x10-78.

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