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Question

Calculate the Mean of the given distribution, using Assumed mean Method.

MarksNo. of Students102022030630401040501250609607087080480903


  1. 48.89

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Solution

The correct option is A 48.89

ClassesClass marks (x)d=xaFrequency (f)fd1020154028020302530618030403520102004050451012120506055090607065108807080752048080908530390d=40f=54fd=330

Let, the assumed mean 'a' = 55

Mean =a+fdf

=55+33054=556.11=48.89


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