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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
The probability of any event is always a number from 0 to 1, inclusive. It can never be 12.
probability
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, ...
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.
P(red star) = 4/15
P(green star) = 2/14
P(red, green) = (4/15)(2/14) = 8/210=4/105
It all depends were you live! If you live in the U.S.A you might get rain. If you live in the northeast of America you might get a lot of rain today, if you live in the south east there is a Tropical storm heading your way, if you live in central you're not getting any rain, if you live up north no rain for you. If you're down south, you'll get some sprinkles, if you live in th south west like I do, you'll get alot of rain. In the west there is no rain. I'm going camping up in CottonWood and hoping it won't rain! But there are floods in Flagstaff. (Big ones, and I think you know where I live)
There is a 50% chance that it will rain tomorrow
The event E must be well defined.
Will margins of error for sample of size 80 be larger or smaller than those for sample size of 40?
They should be smaller for the sample size 80.
A committee consists of 7 woman and 4 men what is the probability that the choice is a woman?
7/11
Note:
Choosing people in a committee is not a matter of chance or probability. Personality, skill, seniority etc. enter into the decision.
No.
What are the odds you will get a face card when you double down?
Because you can only double down on your first action, the odds of getting a face card are 4/48 or 1/12
30% or 4/13.
What are the chances of dying?
if you are around 10 then the chances are very slim, but the older you get the more chances you have of dying
With a 93% return on 188 quarters ($47) you would to expect get back 174.84 quarters ($43.71).
What are the chances of rolling two even numbers on a dice?
6 chances
Actually, it is 1/4. Chances of an even number on the first die are 1/2, and chances on the second die are 1/2; 1/2 x 1/2 = 1/4
How may ways can you put 6 cubes together?
I have not counted the exact amount but it's around 18,000. Ya. That's alot.
