Question

the two consecutive class mars of a distribution are 52 and 57 . find the class limits

Answer 1

class marks are 52 , 57

Therefore class size = 57-52=5

Now we know lower and upper class limits for 52 are

lower limit=52 - 5/2=49.5 

upper limit=52+5/2= 54.5

Now for 57

lower limit= 57-5/2= 54.5

upper limit = 57+5/2= 59.5

Therefore we obtain
52 = 49.5 - 54.5
57 = 54.5 - 59.5

Answer 2

The class intervals of your question are given below: 
                               49.5-54.5
                               54.5-59.5
 hope i helped u,