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In a Mathematics test, the following mar...

In a Mathematics test, the following marks were obtained by 40 students. Arrange these marks in a table using tally marks. (a)Find how many students obtained marks equal to or more than 7.
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Knowledge Check

  • All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace marks were given ?

    A
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    B
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