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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 does find the size of the sample space mean?

A concept in probability theory which considers all possible outcomes of an experiment, game, and so on, as points in a space.

You have a 3-card deck containing a king a queen and a jack you draw a random card then put it back and draw a second random card calculate the probability that you draw exactly 1 jack?

1 - the chance to draw 2 jacks - the chance to draw no jacks leaves you with the chance to draw just one by elimination.

1 - (1/3)*(1/3) - (2/3)*(2/3)

1 - 1/9 - 4/9

1 - 5/9

4/9

A fair coin is tossed 5 times What is the probability of exactly 1 head?

First, you find the probability of picking 1 in 5 disregarding order (combination).

5 C 1 = 5/1 = 5

Then you divide that by the possible number of outcomes which is 25.

5/ 2^5= .0195

How did meiosis explain Mendel's results?

Mendel's laws and meiosis provide the foundation for heredity.

If a die is rolled once what is the probability of rolling a 3 or 4?

Since there are two desired outcomes out of six - the probability becomes 2/6 or 1/3.

I'd say it is rather 2/6 or 1/3...

What is the probability of 6 members of one family being born on a different day of the week?

Births are not distributed uniformly over days of the week: there are fewer births at weekends.

However, if you do assume that the distribution is uniform, then the probability is 6!/76 = 5040/117649 = 0.0428

What is the normal layout of a standard two story house?

Usually the bedrooms and a bathroom are upstairs and kitchen dining, lounge and laundry are down stairs.

If you want a specific layout I think that would vary a lot.

Can standard deviation be above 10?

Yes, depending on the data being studied. Standard deviation can be thought of as the magnitude of the average distance between the data points and their mean.

Probability 7th class maths?

two dice are thrown once. write all the possible outcomes. find the probability of getting:

(i) a total of 12

(ii) a total of 3

(iii) a total of 8

What is the probability of rolling a number that is divisble by 3 or a 5?

Rolling a single die:

Six values are possible. Only five is divisible by five; both three and six and divisible by three; making three possibilities. Therefore, the required probability is 3/6 = 0.5.

A 1000 marbles weigh 2.47kg how much does 1 marbles weigh?

1 kilogram weighs 1000 grams

so 2.47 kilograms = 2470 grams

If 1000 marbles weigh 2470 grams then 1 marble weighs 2470/1000 = 2.47 grams

What is the probability of a tossed coin landing with the tail side up?

It changes from country to country. In the UK, it is 49% because the queens head side is heavier.

In the U.S. both sides are completely equal, as heads and tails is treated as an important game there.

Which standard of equality is most concerned with the distribution of resources?

The equality of outcome is the standard of equality that is most concerned with the distribution of resources. Equality of outcome is used regularly in politics.

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