Solving Random Variable Work: 0 to Infinity = 0.002?

In summary, the conversation discussed integrating from 0 to infinity and equating it to 1, resulting in the value of c being 0.0021. This method was deemed correct.
  • #1
Uniman
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View attachment 432

Work done so far...

Integrating from 0 to infinity and equating it to 1, we get

(c/2*10^-3) = 1

c= 2/1000

=0.002

Is it correct?
http://www.chegg.com/homework-help/questions-and-answers/-q3136942#
 

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  • #2
Uniman said:
https://www.physicsforums.com/attachments/432

Work done so far...

Integrating from 0 to infinity and equating it to 1, we get

(c/2*10^-3) = 1

c= 2/1000

=0.002

Is it correct?
http://www.chegg.com/homework-help/questions-and-answers/-q3136942#

Hi Uniman, :)

Yes the method you have used is correct.

\[\int_{0}^{\infty}C\,\mbox{exp}\left(-\frac{2.1x}{1000}\right)dx=1\]

\[\Rightarrow C\left[-\frac{1000}{2.1}\mbox{exp}\left(-\frac{2.1x}{1000}\right)\right]^{\infty}_{0}=1\]

\[\Rightarrow \frac{1000}{2.1}C=1\]

\[\therefore C=\frac{2.1}{1000}=0.0021\]

Kind Regards,
Sudharaka.
 

Related to Solving Random Variable Work: 0 to Infinity = 0.002?

1. What is a random variable?

A random variable is a quantity that takes on different numerical values with a certain probability in a given situation or experiment. It is usually denoted by the letter "X" and can represent various outcomes or events.

2. How do you solve for a random variable?

To solve for a random variable, you need to determine its probability distribution, which describes the likelihood of each possible outcome. This can be done by creating a probability density function or a cumulative distribution function, depending on the type of random variable.

3. What does "0 to infinity = 0.002" mean in terms of solving a random variable?

This statement means that the probability of the random variable taking on a value between 0 and infinity is 0.002. In other words, the likelihood of the random variable being within this range is very low.

4. Can the value of a random variable ever be exactly 0 or infinity?

No, a random variable can never have a value of exactly 0 or infinity. These values are considered to be impossible outcomes, and the probability of them occurring is 0. However, the random variable can approach these values as the number of trials or experiments increases.

5. How can solving for a random variable be useful in scientific research?

Solving for a random variable allows scientists to make predictions and draw conclusions about the likelihood of certain outcomes or events. It can also help in analyzing and understanding data, as well as in designing experiments and making decisions based on probability.

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