Question

Find the class marks of interval 55-70

Answer 1

Answer:

Here it is ur answers

Step-by-step explanation:

55+70/2

125/2

62.5

Answer 2

The class mark of the class interval 55 - 70 is 62.5

Given :

The class interval 55 - 70

To find :

The class mark of the class

Concept :

Class Mark :

For any grouped frequency table with class intervals, the middle value of the class limits or the class boundaries of any class is called class mark of the class

Solution :

Step 1 of 3 :

Write down the given class interval

The given class interval is 55 - 70

Step 2 of 3 :

Write down Upper Class boundary & Lower class boundary

For the given interval 55 - 70

Upper Class boundary = 70

Lower class boundary = 55

Step 3 of 3 :

Find class mark of the class interval

The class mark of the class interval

$\displaystyle \sf{ = \frac{Upper \: Class \: boundary + Lower \: class \: boundary }{2} }$

$\displaystyle \sf{ = \frac{70 + 55}{2} }$

$\displaystyle \sf{ = \frac{125}{2} }$

$\displaystyle \sf{ = 62.5}$

The class mark of the class interval 55 - 70 is 62.5

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

$1.$ The class mark of the class 90-130 is: a. 90 b. 105 c. 115 d. 110

https://brainly.in/question/47613006

2. For a frequency distribution, the mid-value of the class is 65 and the class size is 8 . What is the upper limit of the ...

https://brainly.in/question/26841285