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After the class test, Manoj noticed that one student's mark of 7 had been entered in the frequency table as 9. When the table is corrected, what happens?

Class 7Frequency Tables and Tally MarksData Handling
  • A7 goes down by 1 and 9 goes up by 1
  • BThe total frequency goes up by 1
  • COnly the frequency of 9 changes
  • D7 goes up by 1 and 9 goes down by 1

Step-by-Step Solution

The student moves from the '9' row to the '7' row: 9 loses one and 7 gains one. The total number of students stays the same.
Answer: D) 7 goes up by 1 and 9 goes down by 1

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