Algebra-1

Question Analysis
This question involves finding the frequency of a missing category (watching TV) in a survey, using the total number of respondents and known frequencies.
The main focus is on applying the principle that the sum of all frequencies equals the total number of observations.

Key Concept Explanation
Missing Frequency in Categorical Data: When the total number of respondents is known, the frequency of an unlisted category is calculated by subtracting the sum of the known frequencies from the total.

Step-by-Step Solution
Calculate the sum of known frequencies: 10 (play sports) + 8 (read) = 18.
Subtract this sum from the total number of students sur...