Recent content by Alexsandro

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    What Is the Probability of the Man Catching the Bus?

    Interesting question about probability. Someone could help me to find the answer ? "[FONT="Arial"]One bus arrives in the bus station between [12:58 am, 1:02 pm] and wait 15 seconds before to go out. One man arrives in the station bus between [12:59 am, 1:01 pm] and wait 30 seconds before to...
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    Understanding Distribution Functions: Proving and Verifying Their Properties

    Could someone help me. I don't able to explain if is FG is a distribution fuction: Show that if F and G are distribution functions and 0 \leq \lambda \leq 1 then \lambda.F + (1 - \lambda).G is a distribution function. Is the product F.G a distribution function?
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    What is the Distribution Function for Y = aX + b?

    Could someone help me to find the probability distribution de Y below: A random variable X has distribution function F. What's the distribution function of Y = a.X + b, where a and b are constants?
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    Representing the Probability Distribution of XY in a Graph

    thanks ------------------------ Thank you, for help. One doubt, that I have, consists of knowing the best way to represent the probability distribution on this situation: for a graph or correspondence between points ?
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    Representing the Probability Distribution of XY in a Graph

    Could someone help me to find the probability distribution de XY below ? Take \Omega to be a set of 5 real numbers. Define a probability measure and a random variable X on it which takes the values 1, 2, 3, 4, 5 with probability \frac{1}{10}, \frac{1}{10}, \frac{1}{5}, \frac{1}{5}...
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    What Is the Probability a Driver Returns to Their Original Lane After 4 Minutes?

    How reach the right answer ? ------------------------------ This question is in a book, that giving the answers. The right answers are: from an outside lane: 3/8; from an inside lane: 11/16.
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    What Is the Probability of Getting at Least One Pair of Shoes from Five Pairs?

    ------------------------ I wrote wrong, not is 0 \choose 1, the correct is 1 \choose 0. I repaired it.
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    What Is the Probability of Correctly Guessing the Colors of Cards?

    Hello, I tried to model and answer this question, but I didn't get success. Could someone help me ? You are told that of the four cards face down on the table, two are red and two are black. If you guess all four at random, what is the probability that you get 0, 2, 4 right ?
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    Question About Cards: Find Probability of Guessing 0, 2, or 4 Right

    Hello, I tried to model and answer this question, but I didn't get success. Could someone help me ? You are told that of the four cards face down on the table, two are red and two are black. If you guess all four at random, what is the probability that you get 0, 2, 4 right ?
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    What Is the Probability a Driver Returns to Their Original Lane After 4 Minutes?

    Hello, I tried to model and answer this question, but I didn't get success. Could someone help me ? Question: A California driver decides that he must switch lanes every minute to get ahead. If he is on 4-lane divided highway and does this at random, what is the probability that he is back...
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    What Is the Probability of Getting at Least One Pair of Shoes from Five Pairs?

    I tryed to do this question of many ways, but I couldn't reach the answer. Could someone help me ? "Four shoes are taken at random from five differents pairs. What is the probability that there is at least one pair among them" ? The answer to this question is below, but I don't know how I...
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    Question of counting and probability

    ------------ Thanks
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    Undergrad How can you explore coin combinations without making change?

    Thanks Thanks, I understood and I could response this question!
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    Undergrad How can you explore coin combinations without making change?

    I didn't understand yet ---------------- I am trying, but I still don't obtaining the answer to part (b). Do you know how to do this ?
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    Undergrad How can you explore coin combinations without making change?

    This question seems easy, but I don't understand what it's mean with "without making change". Could someone help me? If you have 2 dollars, 2 quarter and 3 nickels: a) how many different sums can you pay without making change? b) Change the quarters into dimes and answer again...