# NCERT Solutions For Class 11 Maths Chapter 15 Statistics Ex 15.2

Here, Below you all know about NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.2 Question Answer. I know many of you confuse about finding Chapter 15 Statistics Ex 15.2 Of Class 11 NCERT Solutions. So, Read the full post below and get your solutions.

Textbook | NCERT |

Board | CBSE |

Category | NCERT Solutions |

Class | Class 11 |

Subject | Maths |

Chapter | Chapter 15 |

Exercise | Class 11 Maths Chapter 15 Statistics Exercise 15.2 |

Number of Questions Solved | 10 |

## NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.2

**NCERT TEXTBOOK EXERCISES**

**Ex 15.2 Class 11 Maths Question 1.**

6, 7, 10, 12, 13, 4, 8, 12**Solution:**

Here x_{i} = 6, 7, 10, 12, 13, 4, 8, 12

∴ Σx_{i} = 6 + 7 + 10 + 12 + 13 + 4 + 8 + 12 = 72

n = 8

**Ex 15.2 Class 11 Maths Question 2.**

First n natural numbers**Solution:**

Here x_{i} = 1, 2, 3, 4, ……….n

**Ex 15.2 Class 11 Maths Question 3.**

First 10 multiples of 3**Solution:**

Here x_{i} = 3, 6, 9, 12, 15, 18, 21, 27, 30,

Σx_{i} = 3 + 6 + 9 + 12 + 15 + 18 + 21 + 24 + 27 + 30 = 165

n = 10

**Ex 15.2 Class 11 Maths Question 4.**

**Solution:**

**Ex 15.2 Class 11 Maths Question 5.**

**Solution:**

**Ex 15.2 Class 11 Maths Question 6.**

Find the mean and standard deviation using short-cut method

**Solution:**

**Find the mean and variance for the following frequency distributions in Exercises 7 and 8.**

**Ex 15.2 Class 11 Maths Question 7.**

**Solution:**

**Ex 15.2 Class 11 Maths Question 8.**

**Solution:**

**Ex 15.2 Class 11 Maths Question 9.**

Find the mean, variance and standard deviation using short-cut method.

**Solution:**

**Ex 15.2 Class 11 Maths Question 10.**

The diameters of circles (in mm) drawn in a design are given below:

Calculate the standard deviation and mean diameter of the circles.

[Hint: First make the data continuous by making the classes as 32.5 – 36.5, 36.5 – 40.5, 40.5 – 44.5, 44.5 – 48.5, 48.5 – 52.5 and then proceed.]

**Solution:**

## NCERT Solutions for Class 11 Maths Chapter 15 Statistics Exercise 15.2 PDF

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