Question

7. Find the class marks of the classes 20 - 50 and 35 - 60​

Answer 1

Answer:

35 and47. 5

Step-by-step explanation:

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Answer 2

Answer:

            35 and 47.5

Explanation:

• Class mark is the number in the middle of the class. It is found by adding the upper and lower limits and dividing by 2. It can also be found by adding the upper and lower boundaries and dividing by 2.

• We have to find the class marks of the classes 20 - 50 and 35 - 60​
• Class mark = $\frac{Sum of limits}{2}$  or  $\frac{Upper limit + Lower limit}{2}$

Case 1

• Upper limit= 20

        Lowe limit= 50

        Class mark of class 20−50= $\frac{upper limit+lower limit}{2}$=  $\frac{20+50}{2}$= $\frac{70}{2}$= 35

• Therefore the Class mark of class 20−50 is 35

Case 2

• Upper limit= 35

        Lowe limit= 60

        Class mark of class 35−60= $\frac{upper limit+lower limit}{2}$= $\frac{35+60}{2}$= $\frac{95}{2}$= 47.5

• Therefore the Class mark of class 35−60 is 47.5

To know more about the concept please go through the links;

https://brainly.in/question/9175194

https://brainly.in/question/16165867

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