## RD Sharma Solutions for Class 12 Maths - Mean and Variance of a Random Variable - Free PDF Download

## FAQs on RD Sharma Class 12 Maths Solutions Chapter 32 - Mean and Variance of a Random Variable

**1. What is the variance of a random variable?**

A calculation of spread for the distribution of a random variable, which measures the degree to which the values of a random variable vary from the predicted value. The variance of the random variable X is also written as Var(X) or 𝜎^{2} or 𝜎x^{2}_{.}

**2. What is the mean of a random variable?**

The mean of a discreet random variable X is the weighted average of the possible values that the random variable may take. Unlike the sample mean of a set of observations, which gives equal weight to each observation, the mean of a random variable is xi by its likelihood, pi.

**3. What is the relationship between mean and variance?**

The mean is the sum of a set of numbers, and the variance measures the average degree to which each number varies from the mean.

**4. Are RD Sharma Class 12 Maths Solutions Chapter 32 - Mean And Variance Of A Random Variable good to score better in Class 12 examinations?**

Yes, RD Sharma Class 12 Maths Solutions Chapter 32 - Mean And Variance Of A Random Variable can help students will tend to learn more and more of the subject and thus score better grades in the Class 12 examination. This is because, when students practice the solutions mentioned, they learn about all the concepts of the subject deeply. So they are well prepared for the examination. They don't need to be in chaos before the early days of the examination. Also, the learning power of the students is enhanced.

**5. Where can I find useful study resources for RD Sharma Class 12 Maths Solutions Chapter 32 - Mean And Variance Of A Random Variable?**

You can find RD Sharma Class 12 Maths Solutions Chapter 32 - Mean And Variance Of A Random Variable on the Vedantu app or website. You can find the RD Sharma Class 12 Maths Solutions Chapter 32 -Mean And Variance Of A Random Variable the Vedantu site through the given below mentioned link:

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**7. Is there a time-frame a student should keep while studying Class 12 Maths Solutions Chapter 32 - Mean And Variance Of A Random Variable ?**

Well it takes just some time to go through and understand these solutions. They are just made for the convenience of the students. It also depends upon students' memory power and intelligence. Some students can take less time to go through the revision notes while others can take more time also. It also depends upon the difficulty of the subjects and the chapter's concepts. Those with deeper concepts can be difficult to go through by the students while the normal easy-to-understand concepts and chapters revision notes can be easily gone through within a short time.

**8. Why should students opt for RD Sharma books?**

RD Sharma's book contains a large number of well-graded solved examples. Students can practice these solved examples on their own without looking at the solutions and if they find any difficulty in solving the examples, they may look at the solutions if they are unable to solve them. This would help them develop the confidence to attempt unsolved exercises. This is very important if one wants to score well in the examination. You can get them free of cost through the direct links available on our page or get them online.