NCERT SOLUTIONS FOR CLASS 10 MATHS STATISTICS CHAPTER 14 EX 14.3

NCERT SOLUTIONS FOR CLASS 10 MATHS STATISTICS CHAPTER 14 EX 14.3

Question 1.
The following frequency distribution gives the monthly consumption of electricity of 68 consumers of a locality. Find the median, mean and mode of the data and compare them.
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q1
Solution:
Statistics Class 10 Maths NCERT Solutions Ex 14.3 pdf download Q1
Statistics Class 10 Maths NCERT Solutions Ex 14.3 pdf download Q1.1

Ex 14.3 Class 10 Maths Question 2.
If the median of the distribution given below is 28.5, find the values of x and y.
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q2
Solution:
Ex 14.3 Class 10 Maths NCERT Solutions pdf download Q2
Ex 14.3 Class 10 Maths NCERT Solutions pdf download Q2.1

Ex 14.3 Class 10 Maths Question 3.
A life insurance agent found the following data for distribution of ages of 100 policy holders. Calculate the median age, if policies are given only to persons having age 18 years onwards but less than 60 years.
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q3
Solution:
Exercise 14.3 Class 10 Maths NCERT Solutions pdf download Q3

Ex 14.3 Class 10 Maths Question 4.
The lengths of 40 leaves of a plant are measured correct to nearest millimetre, and the data obtained is represented in the following table:
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q4
Find the median length of the leaves.
Solution:
Exercise 14.3 Class 10 Maths NCERT Solutions pdf download Q4
Exercise 14.3 Class 10 Maths NCERT Solutions pdf download Q4.1

Ex 14.3 Class 10 Maths Question 5.
The following table gives the distribution of the lifetime of 400 neon lamps:
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q5
Find the median lifetime of a lamp.
Solution:
Chapter 14 Maths Class 10 NCERT Solutions Ex 14.3 pdf download Q5

Ex 14.3 Class 10 Maths Question 6.
100 surnames were randomly picked up from a local telephone directory and the frequency distribution of the number of letters in the English alphabet in the surnames was obtained as follows:
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q6
Determine the median number of letters in the surnames. Find the mean number of letters in the surnames. Also, find the modal size of the surnames.
Solution:
Statistics Class 10 Maths NCERT Solutions Ex 14.3 pdf download Q6
Statistics Class 10 Maths NCERT Solutions Ex 14.3 pdf download Q6.1
Statistics Class 10 Maths NCERT Solutions Ex 14.3 pdf download Q6.2

Ex 14.3 Class 10 Maths Question 7.
The distribution below gives the weight of 30 students of a class. Find the median weight of the students.
NCERT Solutions For Class 10 Maths Chapter 14 Statistics Ex 14.3 Q7
Solution:
Statistics Class 10 Maths NCERT Solutions Ex 14.3 pdf download Q7