The number of times an observation occurs in a data is called it's _______

Classify the following data as Primary or Secondary-

Data on favorite food of students obtained directly from the students.

The data not collected directly from the source is called _______

Refer to the following bar graph and answer the question-

Sport most preferred by girls.

Refer to the following bar graph and answer the question-

How many students play Baseball in total?

Refer to the following bar graph and answer the question-

Which game is the least popular?