Classify the data in Q.1 above as primary or secondary data.
Solution:
Think about how you have collected data:
 Did you collect the data all by yourself investigating around? If yes, primary.
 Did you obtain the data from a source where the information has been stored already? If yes, secondary.
Following are the data in Q.1
 Number of houses in our housing society.

Monthly grocery expenses of our home.

Number of people who have used eservices of the state govt. over a year.

Number of students who have enrolled for the Math Olympiad in our school.

Population increase over the decade in our city.
Based on the observation, data in Q.1, 1 and 2 are primary, and the data in 3, 4, and 5 are secondary.
☛ Check: NCERT Solutions Class 9 Maths Chapter 14
Video Solution:
Classify the data in Q.1 above as primary or secondary data.
NCERT Solutions for Class 9 Maths Chapter 14 Exercise 14.1 Question 2
Summary:
Based on the observation, we have found that data in Q.1, 1 and 2 are primary, and the data in 3, 4, and 5 are secondary.
☛ Related Questions:
 The blood groups of 30 students of Class VIII are recorded as follows:A, B, O, O, AB, O, A, O, B, A, O, B, A, O, O,A, AB, O, A, A, O, O, AB, B, A, O, B, A, B, O.Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?
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 Give five examples of data that you can collect from your daytoday life.
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