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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
There are no 7 letter words that can be formed from the letters of the word MARBLE, because MARBLE only has six letters.
What are the chances of dying at 16?
The answer depends on where in the world you live. National statistical organisations in most countries publish mortality rates by age.
However, these are very general averages. Your own chances also depend on
- your gender
- your health
- your occupation
- any inherited illnesses
What will be some of the immediate effects of the rapture if that event happen today?
Chaos will roam the streets for 1000 years and then the end of time will happen after those years!
3 out of 4
What is a real life example of a normal curve called a bell curve?
Height is an example of a normal curve. Most people will be around average height, with some being short or tall, and very few being very short or very tall.
Ah, where are the good old days, when a score of 72 was always better than a score of 62,
and that was all you needed to know, and it didn't matter how well or poorly anybody else
in the class was doing ?
Sam Levinson used to tell about the time his son brought home a report card, and on the
report card the teacher had written "For him, he is doing good", and Sam used to say,
"Now all I need to know is: Who is 'him' ?"
What is the probability of scoring 8 at the throw of a dice?
If using a normal cube, the probability is 0.
How does 1 over 0.0361 equals 27.7 inches of water column?
Dividing 1 by 0.0361 equals 27.7
The division says there are 27.7 parts of 0.0361 in every 1
What is the probability of drawing a black 7 followed by a red queen from a pack of playing cards?
There are two black 7's and two red queen's in a standard deck of playing cards. The probability of drawing a black 7 is 2 in 52, or 1 in 26, or about 0.038. The probability of drawing a red queen from the remaining 51 cards is 2 in 51, or about 0.039.
The probability, then, or drawing a black 7 followed by a red queen is (2 in 52) times (2 in 51), which is 4 in 2652, or 2 in 1326, or about 0.00151.
What is the probability of asking a student at your school what grade he or she is in?
The probability is indeterminate. I might ask a student or I might not.
What is the variance for the uniform random variable?
the variance of the uniform distribution is (a+b)/12
The probability of any event is always a number from 0 to 1, inclusive. It can never be 12.
What is thePoisson distribution with a mean of 5.5?
It is the distribution given by:
Pr(X = x) = e-5-5*(5.5)x/x! for x = 0, 1, 2, ...
probability
How many can a 4 person committee be selected from a group of 8?
Use a binomial to solve this, because order does not matter (i.e., if person #3 get's picked first or picked last, it doesn't matter)
Binomial Formula:
n choose k = n! / [ (n-k)! k! ]
Plug in the Numbers and Solve:
I'll include some of the math steps, so you can see how things cancel out nicely to be able to do these in your head.
8 choose 4 = 8! / [ (8-4)! 4! ]
8! / ( 4! x 4! )
(8 x 7 x 6 x 5 x 4 x 3 x 2) / ( 4 x 3 x 2 x 4 x 3 x 2 )
(8 x 7 x 6 x 5) / (8 x 3)
(7 x 6 x 5) / 3 = (7 x 2 x 5) = 70 combinations
The answer is 70 combinations.
