Statistical Description of Data chapter 13 Exercise Set B CA foundation maths solutions
CA foundation maths solutions for Chapter 14 Statistical Description of Data exercise Set B.
You should study the textbook lesson chapter 14 very well.
You must practice and try all examples and solutions which are given in the textbook.
You can observe the solutions. You will try them in your own merhod.
Chapter 13
CA maths chapter 13 Set C solutions
CA foundation maths solutions
Chapter 13
Statistical Description of Data
Exercise
Set B
Questions and solutions
1. Out of 1000 persons, 25% were industrial workers and the rest were agricultural workers, 300 persons enjoyed world cup matches on TV, 30% of the people who had not watched world cup matches were industrial workers. What is the number of agricultural workers who had enjoyed world cup matches on TV?
Solution:
Total number of persons = 1000
The industrial workers were 25% = 250
30% of the people who had not watched world cup matches were industrial workers.
2. A sample study of the people of an area revealed that total number of women were 40% and the percentage of coffee drinkers were 45 as a whole and the percentage of male coffee drinkers was 20. What was the percentage of female non coffee drinkers?
Solution:
3. Cast of sugar in a month under the heads raw materials, labour, direct production and others were 12,20,35 23 units respectively, What is the difference between the central angles for the largest and smallest components of the cost of sugar ?
4. The number of accidents for 7 days in a locality are given below :
No. of accidents 0 1 2 3 4 5 6 Frequency 15 19 22 31 9 3 2
What is the number of cases when 3 or less accidenst occurred ?
Solution:
The No.of cases when 3 or less accidents occurred = 15 + 19 + 22 + 31 = 87
Set B solutions exercise chapter 13 CA foundation maths solutions
5. The following data relate to the incomes of 86 persons :
income in Rs.500 – 999 1000 – 1499 1500 – 1999 No.of persons 15 28 36
2000 – 2499
7
What is the percentage of persons earning more than Rs. 1500 ?
Solution:
The No.of persons earning more than Rs. 1500 = 36 + 7 = 43
Tota No of persons = 86
The % of person earning more than Rs. 1500 =
(43/86)× 100 = 50
Ans : 50%
6. The following data refers to the marks of a group of students :
Below
Marks : 10 20 30 40 50
No. of students: 15 38 65 84 100
How many students got marks more than 30?
Solution:
Total number of students = 100
The students got marks less than 30 = 65
The students got marks more than 30 = 100 – 65 = 35
7. Find the number of observations between 250 and 300 from the following data :
Value ; more than 200 250 300 350
No. of observations 56 38 15 0
Solution:
The No.of observations between 250 and 300 = 38 – 15 = 23
Note : You can observe the solutions. You will be try them in your own method.