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Assertion (A): The sum of all frequencies in a frequency table equals the total number of observations. Reason (R): Each observation is counted exactly once in the table. Which is correct?

Class 6Data HandlingData Handling
  • ABoth A and R are true and R explains A
  • BBoth A and R are true but R does not explain A
  • CA is true but R is false
  • DA is false but R is true

Step-by-Step Solution

Every observation is tallied once into a category, so adding all the frequencies gives back the total number of observations. R correctly explains A.
Answer: A) Both A and R are true and R explains A

Key idea: From tally to frequency table

Once tallying is done, convert it to a clean **frequency table** with two columns: the **value** (or category) and the **frequency** (how many times it occurred). The frequencies should add up to the total number of items observed — a quick sanity check.

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