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Question

The following table gives the marks obtained by the students of a class in an exam out of 50.

MarksNo. of StudentsBelow 105Below 2010Below 3023Below 4031Below 5040

(i) Convert the cumulative frequency distribution into a regular frequency distribution.

(ii) Find the mean.


A

27

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B

28

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C

27.75

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D

22

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Solution

The correct option is C

27.75


MarksNo. of Students0105102052030133040840509

Class Intervalxififixi01055251020155752030251332530403582804050459405

fi=40 & fixi=1110

Mean
=111040

=27.75


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