## Which Symbol to Calculate First February 8

What is the value of $6\div2(1+2)$?Sorry for asking such a elementary question, but the calculators I own provide different results. According to the first($fx-50FH$ by CASIO), the answer is $9$, calculating it as so: $6 \div 2 \times (1+2)$. However

## Up to how much would one pay to play this game 30 red and 30 blue marbles February 8    1

There are 30 red marbles and 30 blue marbles. Your opponent may arrange these marbles in any way he/she chooses into 2 urns. You then pick one of these 2 urns. You get 10 dollars if you draw red and 0 dollars if you draw blue. How much would you be w

## Formula for encountering C different marbles out of D total draws February 8    1

Say we draw $D$ marbles out of a bag (with infinite marbles), where each marble could be one color out of $C$ colors (each with equal probability). What is the expected value of the number of different colors our total draw includes?So for example, i

## Chance of drawing 4 red marbles out of a big bag. February 8

In a bag with an infinite number of marbles, where a third are red, a third are green and a third are blue. Given that you pick $10$ marbles, of which $3$ are blue, what are the chances of picking $4$ red ones?I've tried looking for an answer in the

## Expected value of a the reciprocal of a random number February 8    2

If I selected a real number at random from the interval (0.0,1.0), assuming a uniform distribution, the "expected value" would be 0.5. (I am not certain I am using the phrase correctly; I mean, if I took a large number of sample, I would expect

## Understanding the meaning of seed in generating random values February 8    1

I am working on a project and I'm reading this description on generating random bits in a file. They use the word "seed" in it. I've read what seed does, but I'm not quite sure how to apply it in this context."rand-src creates a file of ran

## generating random number in the range +/-(n to n+x) February 8    2

I want to generate a random number that falls in the range 50 to 100 and -50 to -100 I am now using the following formula to achieve this:(50 + (rand() % 50)) * ((rand() % 2) * 2 - 1) where(50 + (rand() % 50)) gives me a random number in the range 50

## How to use composition to generate random variates February 8

I want to know how to use composition to generate random variates whose cdf and pdf are as follows.

## How to generate a random variable by composition February 8

If I want to generate a random variable with such a pdf: $f(x) = \dfrac 3 {2}x^2 : [-1, 1] \to \Bbb R$ by composition, what should I do?I think I can divide the pdf by $x=0$ into two parts. But the $f(x)$ of the new two parts are the same and the CDF

## How to find the max of two different random variables February 8

If I have 1 uniformly distributed RV and the other one constant with fixed value if the first one is and I have a constant length say r1. I want to write the PDF that represents the max betw ...

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