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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

A test has 15 questions each with 4 possible answers What is the probability of getting 5 correct?

That really depends on whether or not you are at all familiar with the subject at hand: For example, I know NOTHING about brain surgery, so I would "probably" miss EVERY question.

What is the probability of getting an a from Alabama?

There are four a's in ALABAMA. The probability of choosing an a from a random draw of those seven letters is 4 in 7, or about 0.5714.

If you are talking about getting a grade of A from a school in Alabama, that is entirely up to you and to how well you apply yourself.

How does the number of repetitions effect the shape of the normal distribution?

When we discuss a sample drawn from a population, the larger the sample, or the large the number of repetitions of the event, the more certain we are of the mean value.

So, when the normal distribution is considered the sampling distribution of the mean, then more repetitions lead to smaller values of the variance of the distribution.

How many outcomes are there for one toss of the octohedron and one toss of the dodecahedron?

There are 96 possible outcomes. A dodecahedron has 12 sides, so it has 12 possible outcomes. An octohedron has 8 sides. So for each of the 12 outcomes on the dodecahedron, the octahedron has 8 possible outcomes, hence you multiply 12 x 8 = 96.

How many different ways can you arrange the numbers 1 to16?

If all 16 numbers show up in each arrangement, then they can be arranged in

20,922,789,890,000 different ways.

(That number is rounded to the nearest ten thousand, so it's accurate to within

one ten-millionth of 1 percent.)

What is the probability of a red face card is not drawn from adeck of cards?

The answer depends on how many cards are drawn and whether or not they are replaced afterwards.

For a single card, drawn at random, the probability is 26/52 = 1/2.

The answer depends on how many cards are drawn and whether or not they are replaced afterwards.

For a single card, drawn at random, the probability is 26/52 = 1/2.

The answer depends on how many cards are drawn and whether or not they are replaced afterwards.

For a single card, drawn at random, the probability is 26/52 = 1/2.

The answer depends on how many cards are drawn and whether or not they are replaced afterwards.

For a single card, drawn at random, the probability is 26/52 = 1/2.

What does picking mean?

I= Insterting

P=Purpose

I=Unknown

C=Chose

K=Knowledge

What events happen in world war1?

Germany, Italy and Austria -Hungary joined up 2 make a team and so did England, Russia and France - they had a war and The Britais team one

Is 21 a factor of 182?

No. 21 is not a factor of 182. The prime factorization of 182 is 21 x 71 x 131.

What do you do if you are running a comparison to historical data and your background standard deviation is zero?

A standard deviation of 0 implies all of the observations are equal. That is, there is no variation in the data.