Question

Classify the data given below as primary or secondary data:

 Shoe size of 10 students of class 9.

 The blood groups of any 20 of your friends.

 Number of members in the families of your classmates.

 Marks obtained by 30 students in a mathematics test.

 Number of plants planted by 100 schools during Van Mahotsava.​

Answer 1

Answer:

1 and 3 are secondary data because this data is not for investigation purpose

2,3 and 5 are primary data because this data is for investigation purpose

Answer 2

1. Secondary data

2. Primary data

3. Secondary data

4. Primary data

5. Primary data