The given bar graph represents the number of students who appeared in the board examinations in session 2017-18 and 2018-19. Study the graph and answer the question that follows.

The difference between the average number of students of Science and Humanities streams in 2017-2018 and that in Commerce and Vocational in 2018-19, is:

4

Average number of students of Science and Humanities streams in 2017-2018 

= \(\frac{25+53 }{2 }\)

= \(\frac{78 }{2 }\)

= 39

Average number of students of Commerce and Vocational in 2018-19

= \(\frac{48+38 }{2 }\)

= \(\frac{86 }{2 }\)

= 43

Difference between the average number of students of Science and Humanities streams in 2017-2018 and that in Commerce and Vocational in 2018-19

= 43 - 39

= 4