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Are negative numbers discrete random variables?
Discrete variables must be countable and not negative. So no a negative number must be a continuous variable.
Is 3.24 rational or irrational?
3.24 is rational because rational numbers are any number... the only numbers not rational are ones that go forever in a random pattern (ex. 3.14159265...). 3.363636363636... is rational because it goes on in a pattern. Hope that helped :)
If a bag contains 20 chips labeled with the numbers 1 through 20 and one chip is selected at random. what is the probability that the chip has the number 17 on it?
The probability of selecting a 17 (or any number for that matter) is 1/20 or .05 or 5%.
A random variable that can assume only a finite number of values is referred to as?
That would be a discrete variable; or, in your case, it would probably be called a discrete random variable.
Is it possible to build an irrational number whose decimal digits are just 1's and 2's?
Yes, it is. All you need to do is to ensure that there is no repeating pattern in the digits. You could use random numbers to generate a sequence of 1s and 2s but unfortunately, most of these are actually pseudo-random number generators: they generate sequences which pass the tests for randomness up to a point but eventually fail. You could try linking the decision the hoice of 1s and 2s to tosses of a coin or to radioactive decay which are random.Alternatively, you could try1.21121112111121111121111112... where the length of the string of 1s increases by 1 between the 2s.
