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AnswerQuestion Answers for Class 12Class 12 BiologyClass 12 ChemistryClass 12 EnglishClass 12 MathsClass 12 PhysicsClass 12 Social ScienceClass 12 Business StudiesClass 12 EconomicsQuestion Answers for Class 11Class 11 EconomicsClass 11 Computer ScienceClass 11 BiologyClass 11 ChemistryClass 11 EnglishClass 11 MathsClass 11 PhysicsClass 11 Social ScienceClass 11 AccountancyClass 11 Business StudiesQuestion Answers for Class 10Class 10 ScienceClass 10 EnglishClass 10 MathsClass 10 Social ScienceClass 10 General KnowledgeQuestion Answers for Class 9Class 9 General KnowledgeClass 9 ScienceClass 9 EnglishClass 9 MathsClass 9 Social ScienceQuestion Answers for Class 8Class 8 ScienceClass 8 EnglishClass 8 MathsClass 8 Social ScienceQuestion Answers for Class 7Class 7 ScienceClass 7 EnglishClass 7 MathsClass 7 Social ScienceQuestion Answers for Class 6Class 6 ScienceClass 6 EnglishClass 6 MathsClass 6 Social ScienceQuestion Answers for Class 5Class 5 ScienceClass 5 EnglishClass 5 MathsClass 5 Social ScienceQuestion Answers for Class 4Class 4 ScienceClass 4 EnglishClass 4 MathsFind the actual lower and upper class limits and also the class marks of the classes:1.1-2.0, 2.1-3.0, 3.1-4.0A) Actual lower limits: 1.05, 2.05, 3.05 Actual upper limits: 2.05, 3.05, 4.05 Class marks: 1.55, 2.55, 3.55B) Actual lower limits: 1.5, 2.5, 3.5 Actual upper limits: 2.5, 3.5, 4.5 Class marks: 1.5, 2.5, 3.5C) Data insufficientD) None of theseAnswerVerified569.7k+ viewsHint: Class mark is the mid point of the class interval. Upper limit is the highest value of the class interval. Similarly, the lower limit is the smallest value of the class interval. For finding the actual upper limits and actual lower limits , we need to make the upper limit of a certain class and lower limit of the next class to be equal and same for the lower limit. \[d=\dfrac{\left( \text{upper limit - lower limit} \right)}{2}=\dfrac{2.1-2.0}{2}=0.05\] \[\] Upper limit is the highest value of the class interval and the actual upper limit is obtained by adding 0.5 to the highest number if the number is represented as a whole number or add 0.05 to the highest number if the number is represented as decimal. Similarly, the lower limit is the smallest value of the class interval and the actual lower limit is obtained by subtracting 0.5 to the smallest number if the number is the whole number or subtract 0.05 to the smallest number if the number is decimal.Complete step by step answer:Given, class intervals are 1.1−2.0,2.1−3.0,3.1−4.0Since, the intervals are represented in decimal; we add and subtract 0.05 to get the actual limits. For class interval 1.1−2.0, Class mark is \[\dfrac{\left( 1.1+2.0 \right)}{2}=\dfrac{3.1}{2}=1.55\] Actual upper limit is 2.0+0.05=2.05 andactual lower limit is 1.1−0.05=1.05 Similarly for 2.1−3.0, Class mark is \[\dfrac{\left( 2.1+3.0 \right)}{2}=\dfrac{5.1}{2}=2.55\] Actual upper limit is 3.0+0.05 = 3.05 andactual lower limit is 2.1−0.05 = 2.05 Similarly for 3.1−4.0, Class mark is \[\dfrac{\left( 3.1+4.0 \right)}{2}=\dfrac{7.1}{2}=3.55\] Actual upper limit is 4.0+0.05=4.05 andactual lower limit is 3.1−0.05=3.05 Therefore, actual upper limits are 2.05,3.05,4.05Actual lower limits are 1.05,2.05,3.05Class marks are 1.55,2.55,3.55 Therefore the correct option is A.Note:Learn the differences between upper limit , lower limit, actual upper limit and actual lower limit. We should add 0.5 when it is a=whole number and 0.05 when it is a decimal for both lower limit and upper limit. Class mark is the midpoint of the class interval.Recently Updated PagesWhy are manures considered better than fertilizers class 11 biology CBSEFind the coordinates of the midpoint of the line segment class 11 maths CBSEDistinguish between static friction limiting friction class 11 physics CBSEThe Chairman of the constituent Assembly was A Jawaharlal class 11 social science CBSEThe first National Commission on Labour NCL submitted class 11 social science CBSENumber of all subshell of n + l 7 is A 4 B 5 C 6 D class 11 chemistry CBSEWhy are manures considered better than fertilizers class 11 biology CBSEFind the coordinates of the midpoint of the line segment class 11 maths CBSEDistinguish between static friction limiting friction class 11 physics CBSEThe Chairman of the constituent Assembly was A Jawaharlal class 11 social science CBSEThe first National Commission on Labour NCL submitted class 11 social science CBSENumber of all subshell of n + l 7 is A 4 B 5 C 6 D class 11 chemistry CBSE

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