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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 rolling a 6 and then a 1 on consecutive rolls of a standard sided number cube?

If you keep rolling the die, then the probability of rolling a 6 and then a 1 on consecutive rolls is 1.The probability is 1/36 for the first two throws.

What is the probability that your thirteenth birthday will land on a Saturday?

The simple answer is that it is 1/7. The true answer is somewhat different because births are not uniformly spread across the days of the week. In some countries medical staff prefer to spend their weekends off and so there are fewer births at weekends. Then, there are other minor adjustments for the number of leap years between birth and the thirteenth birthday.

What is mean and standard deviation?

They are statistical measures. For a set of observations of some random variable the mean is a measure of central tendency: a kind of measure which tells you around what value the observations are. The standard deviation is a measure of the spread around the mean.

What is the probability that sales will be greater than 5500 oranges?

In order to answer that question, we need some information. Any information.

About the organization, the sales force, the market, the price, the competition,

the source of the product, the time duration being considered, anything.

Give us something!

What is difference between proportion and probability?

Proportion is the probability of a selected sample. probability is the true probability of all cases. If this is not what you are looking for then please specify.

Two standard six-sided dice are rolled what is the probability of rolling a two on at least one of the dice?

The probability is 11/36. There are 36 possible outcomes, but 25 of these don't involve a 2 on either die.

The way to answer this is to ask what is the probability of not rolling a 2 on either die and subtract this from one.

The probability of not rolling a 2 with the first die is 5/6. It is of course also 5/6 chance of not rolling a 2 with the second die. So we multiply the probabilities and subtract from 1.

1 - (5/6 * 5/6) = 1 - (25/36) = 11/36.

Number that describes a certain event will occur?

probability.

eg.if i have 5 boxes and one of them has a chocolate,what is the probability that if i open a box,itt will have a chocolate.it's 1 in 5 or 0.2.

Probability of page fault is equal to?

If you are asking the chances of a web page not working then the chances are vanishingly small if the page is part of a well designed, well maintained web site run on a quality computer system and responsibly updated and monitored.

A fair nickel and a fair dice are tossed once outcomes match when both coins land on heads or both coins land on tails What is the theoretical probability of a match?

The probability of 2 coins both landing on heads or both landing on tails is 1/2 because there are 4 possible outcomes. Head, head. Head, tails. Tails, tails. Tails, heads. Tails, heads is different from heads, tails for reasons I am unsure of.

How many necklace of 12 beads each can be made from 18 beads of different colours?

if order of beads matters than you get 18P12= 8.892185702*1012. if order doesn't matter than it's 18C12= 18564 ways to arrange the beads.

What is the probability of getting an ace and a king from a deck of 52 cards?

The question is very poorly defined and so cannot be answered. It is necessary to know how many cards are picked and whether or not they are replaced in the pack afterwards. It also depends on whether the deck is well shuffled and the cards are picked at random.

If the cards are not replaced and you pick enough cards (49), it is a certainty.

If you pick only two cards, without replacement, the probability is (8/52)*(4/51) = 32/2652 = 0.012 approx.

What is the probability of drawing a red even card from a deck and then throwing a sum of 11 with a pair of dice?

The probability of drawing a red even card is 5 in 13 (assuming that the face cards are neither even nor odd). The probability of throwing a sum of 11 is 1 in 18. The probability, then, of doing both of these actions, since they are mutually independent, is simply their product, or (5 in 13) times (1 in 18) equals 5 in 234, or about 0.02137.

What are the odds of throwing doubles using two dice?

6 in 36, or in simplest form 1 in 6.

For each number rolled on one die, there are only 6 possibilities for the other.