# NCERT Solutions For Class 11 Maths Chapter 15 Statistics Ex 15.3

Here, Below you all know about NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.3 Question Answer. I know many of you confuse about finding Chapter 15 Statistics Ex 15.3 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 15.3 |

Number of Questions Solved | 5 |

## NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.3

**NCERT TEXTBOOK EXERCISES**

**Ex 15.3 Class 11 Maths Question 1.**

From the data given below state which group is more variable, A or B?

**Solution:**

For Group A :

**Ex 15.3 Class 11 Maths Question 2.**

From the prices of shares X and Y below, find out which is more stable in value:

**Solution:**

**Ex 15.3 Class 11 Maths Question 3.**

An analysis of monthly wages paid to workers in two firms A and B, belonging to the same industry, gives the following results:

**(i)** Which firm A or B pays larger amount as monthly wages?**(ii)** Which firm, AorB, shows greater variability in individual wages?

**Solution:****(i) Firm A :**

Number of wage earners (n_{1}) = 586

Mean of monthly wages (x1¯¯¯¯¯) = Rs.5253

∴ Total monthly wages = 5253 x 586

= Rs. 3078258

Firm B :

Number of wage earners (n_{2}) = 648

Mean of monthly wages (x2¯¯¯¯¯) = Rs.5253

∴ Total monthly wages = 5253 x 648

= Rs. 3403944

Hence, Firm B pays larger amount as monthly wages.

**(ii)** Since both the firms have same mean of monthly wages, so the firm with greater variance will have more variability in individual wages. Thus firm B will have more variability in individual wages.

**Ex 15.3 Class 11 Maths Question 4.**

The following is the record of goals scored by team A in a football session:

For the team B, mean number of goals scored per match was 2 with a standard deviation 1.25 goals. Find which team may be considered more consistent?**Solution:**

For team A:

**Ex 15.3 Class 11 Maths Question 5.**

The sum and sum of squares corresponding to length x (in cm) and weight y (in gm) of 50 plant products are given below:

Which is more varying, the length or weight?**Solution:**

## NCERT Solutions for Class 11 Maths Chapter 15 Statistics Exercise 15.3 PDF

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