Question

classify the data given below as primary or secondary data : • Shoe size of 10 students of class 9th .
• 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.
• Numbers of plants planted by 100 schools during Van Mahotsava.​

Answer 1

Answer:

1.Primary data

2.Primary data

3.Secondary data

4.Primary data

5Secondary data