Question

Class mark of a class interval U-L is
a. U+l/2
b. U-l/2
c. U-l
d. 2(U+L)​

Answer 1

Answer:

Class mark is (U+L)/2....

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Class mark of a class interval U - L is

a. U + L/2

b. U - L/2

c. U - L

d. 2(U+L)

CONCEPT TO BE IMPLEMENTED

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

EVALUATION

Here the given class interval is U - L

Upper Class boundary = L

Lower class boundary = U

$\displaystyle \sf{ = \frac{U + L}{2} }$

FINAL ANSWER

Hence the correct option is

$\displaystyle \sf{ a. \: \: \: \: \frac{U + L}{2} }$

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