# 10th Maths Book Back Statistics and Probability Ex 8.2

## Samacheer Kalvi 10th Maths Book Back Solution:

Tamil Nadu 10th Maths Book Back Answers Unit 8 – Statistics and Probability Ex 8.2 are provided on this page. Samacheer Kalvi Maths Book Back Solutions/ Guide available for all Units. TN Samacheer Kalvi 10th Maths Book consists of 8 Units and each unit book back solutions given below topics wise with Questions and Answers. The complete Samacheer Kalvi Books Back Answers/Solutions are available on our site.

The Samacheer kalvi 10th Maths solutions are useful to enhance your skills. Candidates who prepared for the Competitive and board exams 10th Maths Book Back Answers in English and Tamil Medium. The 10th Maths Unit 8 Statistics and Probability consist of 5 units. Each Unit Book Back Answers provide topic-wise on this page. 10th Maths Book Back Answers are prepared according to the latest syllabus. The 10th Maths Book Back Relations and Functions Ex 8.2 Answers in English.

### 10th Maths Book Back Answers/Solutions:

TN Samacheer Kalvi 10th Maths Chapter 8 Book Back Exercise given below. The 10th Maths Book Back Solutions Guide is uploaded below:

### Exercise 8.2 Statistics and Probability

1. The standard deviation and coefficient of variation of data are 1.2 and 25.6 respectively. Find the value of the mean.
Solution:
Co-efficient of variation C.V. = $$\mathrm{C.V}=\frac{\sigma}{\overline{x}} \times 100$$ 2. The standard deviation and coefficient of variation of data are 1.2 and 25.6 respectively. Find the value of the mean.
Solution: 3. If the mean and coefficient of variation of data are 15 and 48 respectively, then find the value of standard deviation.
Solution: 4.If n = 5 , $$\overline{x}$$ = 6, $$\Sigma x^{2}$$ = 765, then calculate the coefficient of variation.
Solution: 5. Find the coefficient of variation of 24, 26, 33, 37, 29,31.
Solution:  6. The time taken (in minutes) to complete homework by 8 students in a day is given by 38, 40, 47, 44, 46, 43, 49, and 53. Find the coefficient of variation.
Solution: 7. The total marks scored by two students Sathya and Vidhya in the 5 subjects are 460 and 480 with a standard deviation of 4.6 and 2.4 respectively. Who is more consistent in performance?
Solution:  8. The mean and standard deviation of marks obtained by 40 students of a class in three subjects Mathematics, Science, and Social Science are given below. Which of the three subjects shows the highest variation and which shows the lowest variation in marks?
Solution: Science subject shows the highest variation. Social science shows the lowest variation.

9. The temperature of two cities A and B in the winter season are given below. Find which city is more consistent in temperature changes?
Solution:  ∴ Co-efficient of variation of City A is less than the C.V of City B.
∴ City A is more consistent.