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Question

In a mathematics test following marks were obtained by 40 students of class VI. Arrange these marks in a table using, tally marks.
8 1 3 7 6 5 5 4 4 2
4 9 5 3 7 1 6 5 2 7
7 3 8 4 2 8 9 5 8 6
7 4 5 6 9 6 4 4 6 6

(i) Find how many students obtained marks equal to or more than 7?
(ii) How many students obtained marks below 4?

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Solution

Frequency distribution of the given marks in Mathematics:

(i) Number of students who have obtained marks equal to or more than 7
= frequency of 7 + frequency of 8 + frequency of 9
= 5 + 4 + 3 = 12

(ii) Numbers of students who have scored below 4
= Frequency of 1 + frequency of 2 + frequency of 3
= 2 + 3 + 3 = 8

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