Question

Q5.The class mark of a frequency distribution are given as follows; 12.5,17.5,22.5......The class corresponding to ciass mark
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Answer 1

Answer:

Solution :

Since, the difference between mid values is 5. So, the corresponding class to the class mark 20 must have difference 5. Therefore, option ( c) and (d) are wrong.

Since, the mid values is 20 which can get only, if we take option (b)

17.5+22.52=402=20