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Two histograms of the same 100 marks are drawn, one with class width 10 and one with class width 20.
Which statement is always true when you regroup into wider classes?

Class 8Bar Graphs and HistogramsData Handling
  • AThe total frequency stays 100 but there are fewer, taller bars
  • BThe total frequency doubles
  • CThe number of bars increases
  • DThe class marks become smaller

Step-by-Step Solution

Regrouping does not change the total count (still 100); wider classes merge data into fewer bars that are generally taller.
Answer: A) The total frequency stays 100 but there are fewer, taller bars

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