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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 getting 2 aces when given 5 cards out of a normal 52 card deck?
5 cards out of 52 may be drawn in 52C5 = 2 598 960 ways.
2 aces out of 4 may be drawn in 4C2 = 6 ways.
3 non-aces out of 48 non-aces may be drawn in 48C3 = 17 296 ways
P( 2 aces ) = (4C2)(48C3) / (52C5) = (6)(17 296)/( 2 598 960)
= 0.0399
Why are the events of spinning a spinner and rolling a number cube independent events?
Because the number cube is not sentient enough to know the result of the spinner and modify its own outcome accordingly. And conversely, the outcome of the spinner is not affected by the roll of the cube.
5000 students participated in a certain test yielding a result that follows the normal distribution with means of 65 points and standard deviation of 10 points.
(1) Find the probability of a certain student marking more than 75 points and less than 85 points inclusive.
(2) A student needs more than what point to be positioned within top 5% of the participants in this test?
(3) A student with more than what point can be positioned within top 100 students?
i dont understand the question.. could you help me??pls....
What does equally likely as unlikely mean in probability?
If you are using it in terms of an event (aka rolling a dice, flipping a coin, etc.) it means there is a 50% chance of it happening and not happening. It can be equal to 50% or 1/2 or anything equal to those!
How do you find the probability of the complement of an event?
The probability of the complement of an event, i.e. of the event not happening, is 1 minus the probability of the event.
What is the probability of flipping three tails when three coins are flipped?
The probability of flipping three tails with three coins is (1 in 2)3 or 1 in 8 or 0.125.
Why does a Uniform distribution have a greater standard deviation?
The answer depends on greater standard deviation that WHAT!
What is the math definition of result in math?
Whatever you got when you closely looked at the problem and answered it with the most accurate answer in other words the result conclusion nothing before but what is after
When rolling one die 12 times what is the probability of rolling a 2?
The probability of rolling at least one 2 when rolling a die 12 times is about 0.8878. Simply raise the probability of not rolling a 2 (5 in 6, or about 0.8333) to the 12th power, getting about 0.1122, and subtract from 1.
What is the probability of rolling an even number on an eight-sided die?
Assuming that there are an equal number of even and odd faces on the eight-sided die, then the probability of rolling an even number is simply 4 in 8, or 1 in 2, or 0.5.
How many different permutations can be made with the letters in the following?
There are 12 letters in the following, with two pairs of doubles so the answer is
12!/[2!*2!] = 119,750,400
What is the usefulness of person's coefficient skewness?
In my 40 years as a professional statistician, I have yet to come across any person with a coefficient skewness and I am not sure that such a thing exists. That being the case, it has no usefulness.
When 1 dice is thrown what is the probability of getting a number greater than 4?
the probability is 2/6 or 1/3
Does the curve in a normal distribution stop at plus or minus 3 standard deviations?
No. The curve in a normal distribution goes on out to plus and minus infinity. You might never see any observations out there, but if you were to make an infinite number of observations, you theoretically would.
There are no s's in a standard deck of cards, so the probability of selecting any s's, in any sequence of draws, in any strategy of replacement is exactly zero.
How many permutations are in the word DAD?
because permutations are order specific, and because there are two d's "dad" counts as only one.
so it is 6 (3P3)/2 (there are two d's) so the answer is 3
DAD ADD DDA
What is the probability of rolling a 4 sided dice a factor of 24?
Assuming the numbers on the die are 1, 2, 3 and 4, the probability is 1.
What is the probability that a diamond card will be drawn out of a deck of cards?
The probability of drawing a diamond is a standard deck of 52 cards is 13 in 52, or 1 in 4, or 0.25.
What is the probability of rolling a 7 with one roll of a standard number cube?
The probability of rolling a seven with one roll of a standard number cube is zero.
What is the theoretical probability of rolling an odd number?
The probability of rolling an odd number on a standard die is 3 in 6, or 1 in 2, or 0.5.
What is the probability that the vowel is before j?
The answer depends on what language you refer to. It also depends on which particular vowel is being referred to as "the vowel".
Then you would need to know the number of words in that language that contained a j as well as those that contained a j after the vowel. The second number divided by the fist would give the required probability.
