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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 chief aim of probability sampling is to be able to select?

The chief aim is to find a representative sample; that is, a sample which reflects the properties of the population, as a whole.

Are mutually exclusive events?

Mutually exclusive events are occurrences where, say, a couple of propositions are possible, but if one occurs, the other cannot. A coin toss might be a good example. A coin lands heads or it lands tails. It cannot land on both in the same toss. A coin toss, therefore, can be said to be a mutually exclusive event.

What is true of a random sample?

Every member in the population has the same probability of being in the sample.Or, equivalently, every set of the given sample size has the same probability of being selected.

What is the experimental probability that the next toss and spin will result in 3 and tails?

The experimental probability, by definition, can only be determined after you have carried out the experiment!

If A die rolled 260 times how many items will it roll 5 or 3?

Assuming a standard unbiased 6-sided die:

The probability of 5 or 3 = 2/6 = 1/3

→ The expectation when it is rolled 260 times is 260 × 1/3 = 86 2/3

→ You would expect to see a 5 or 3 about 87 times when rolling a die 260 times

Which best describes probability?

the likelihood that something will happen

You pick a card at random, put it back, and then pick another card at random.What is the probability of picking a 3 and then picking a 3?

Assuming that you are using a full deck of playing cards, excluding Jokers, there would be four 3s in a deck of fifty-two total cards, making your chances of drawing a 3 the first time 1:13. However, to draw two 3s in a row in a true random scenario, we start with the condition that you have already drawn your first 3 (the 1:13 chance). Going from here, we would then have another 1:13 chance of drawing a 3, so we simply multiply the two ratios to arrive at a probably of 1:169.

What is the probability in picking a vowel in mathematical?

Probablity of picking up 3 vowels from the word MATHEMATICS Each of the letters in the word MATHEMATICS is on a letter tile in a bag