Question

the class mark of ark of a particular class is 6.5 and its class size is 3.Write the next two classes if they are continuous

Answer 1

let the upper class limit of the class interval be U and lower limit be L.

given,
class mark = 6.5
ie. (U+L)/2=6.5
=> U+L = 13...........(1)
and class size class size= 3
ie. U-L= 3. ......,...(2)
solving (1) and (2),
U=8
and L=5

Therefore next two classes are
8-11
11-14

Answer 2

Hi friend,

Here is your answer,
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lower limit of the class interval = 6.5 - ³/₂
                                                 = 6.5 - 1.5
                                                 = 5

Upper limit of the class interval = 6.5 + ³/₂
                                                  = 6.5 + 1.5
                                                  = 8
Next two class will be :- 
                                 (i) Lower limit = 8 
                                     Upper limit = 8+3 = 11
                                            { Class: 8-11 }

                                (ii) Lower limit = 11
                                     Upper limit = 11+3 = 14
                                           { Class: 11-14 }
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