Case Study Questions for Class 10 Maths Chapter 14 Statistics
Question 1:
Direct income in India was drastically impacted due to the COVID-19 lockdown. Most of the companies decided to bring down the salaries of the employees upto 50%.
The following table shows the salaries (in percent) received by 50 employees during lockdown.
Based on the above information, answer the following questions.
(i) Total number of persons whose salary is reduced by more than 20% is
(a) 40
(b) 46
(c) 30
(d) 22
(ii) Total number of persons whose salary is reduced by atmost 40% is
(a) 32
(b) 40
(c) 46
(d) 18
(iii) The modal class is
(a) 50-60
(b) 60-70
(c) 70-80
(d) 80-90
(iv) The median class of the given data is
(a) 50-60
(b) 60-70
(c) 70-80
(d) 80-90
(v) The empirical relationship among mean, median and mode is
(a) 3 Median = Mode +2 Mean
(b) 3 Median = Mode −2 Mean
(c) Median = 3 Mode −2 Mean
(d) Median =3 Mode +2 Mean
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Chapter 1 Real Numbers
Chapter 2 Polynomials
Chapter 3 Pair of Linear Equations in Two Variables
Chapter 4 Quadratic Equations
Chapter 5 Arithmetic Progressions
Chapter 6 Triangles
Chapter 7 Coordinate Geometry
Chapter 8 Introduction to Trigonometry
Chapter 9 Some Applications of Trigonometry
Chapter 10 Circles
Chapter 11 Constructions
Chapter 12 Areas Related to Circles
Chapter 13 Surface Areas and Volumes
Chapter 14 Statistics
Chapter 15 Probability