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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
50 percent
Please help NOW SOS
DATA GATHERING
It is 1/8.
It is 11/18.
P(R) = 0.7
The correct choice of answer is B. 71%.
0.55
The possible prime numbers are 2, 3, 5
The possible numbers greater than 3 are 4, 5, 6
→ a success is 2 3, 4, 5, 6
→ pr(prime or > 3) = 5/6
What is the probability of not rolling a sum of 2 with two fair dice?
If you roll them often enough then the probability is 0. For just one roll, the probability is 35/36.
A fair die is thrown What is the probability that a prime number will occur?
When a fair die is thrown the probability that a prime number will occur is 2:1
Describe using word the probability of winning the the lottery?
The probability of winning a lottery depends on the lottery. The probability of winning the jackpot is extremely small, though the probability of winning something is not quite as tiny.
What are the odds of rolling doubles six times in a row?
Odds of rolling ONE six - 6:1
Odds of rolling TWO sixes - 36:1
Odds of rolling two sixes, SIX times - 216:1
What is the best definition of sample space of a probability event?
Not sure about the "best" definition. It is the set of all possible outcomes for the event.
What is the probability in percent that a single coin toss will result in heads and tails?
The probability is 0%. The result will be heads or it will be tails but it cannot be heads and tails.
Assess hazards
What is the probability of getting a even number in a deck of cards?
Well, in a deck of cards, there's 2, 4, 6, 8, and 10, so that's five cards. Take those five cards and multiply it by four, because there's four different suits (clubs, diamonds, spades, and hearts.) This gives you 20, out of 52 cards, or a 20/52 chance. You can reduce this by dividing by 4, to get a 4/13 chance. You can use a calculator to divide that out and find the percentage answer, which is 38.5 percent.
If you include the two jokers, then you have a 20/54 chance of drawing an even number, which works out to a 37 percent chance.
A particular fruit's weights are normally distributed, with a mean of 760 grams and a standard deviation of 15 grams. If you pick one fruit at random, what is the probability that it will weigh between 722 grams and 746 grams-----A particular fruit's weights are normally distributed, with a mean of 567 grams and a standard deviation of 25 grams.
How many different ways can you arrange the letters in the word journalism?
There are 10 letters is the word JOURNALISM. Since they are all different, the number of ways you can arrange them is simply the number of permutations of 10 things taken 10 at a time, or 10 factorial, or 3,628,800.
- A bag of marbles contains 13 marbles. 5 Blue, 3 Yellow, 4 Green and 1 Red. Leave all answers as a ratio in lowest terms. 18 points
On a single draw, what is the probability of drawing a yellow marble?
What is the probability of not drawing a yellow marble?
What are the odds in favor of drawing a blue marble?
What is the probability of drawing a red or yellow marble?
What is the probability of drawing a purple marble?
If you had to bet on drawing a marble of a certain color what color would you not choose?
What is Variance in normal distribution?
This browser is not much use when it comes to mathematics but I'll try.
Suppose X is a random variable with a Normal distribution and let f(x) be the probability density function of x.
Then the mean is mu = E(X) = Integral of x*f(x) dx over the domain of X [which is negative infinity to positive infinity].
The variance is E{[X - E(X)]2} = Integral of (x - mu)2*f(x) dx over the domain of X.
