Following table shows the percentage of boys and difference between the number of boys and the number of girls among the students of six different schools who appeared in board examination in different years.

What is the average of the number of boys who appeared from School E, taking all the four years together?

Following table shows the percentage of boys and difference between the number of boys and the number of girls among the students of six different schools who appeared in board examination in different years.

What is the total number of girls who appeared in the examination from all the six schools in the year 1987?

Following table shows the percentage of boys and difference between the number of boys and the number of girls among the students of six different schools who appeared in board examination in different years.

What is the difference between the total number of students appearing from School B in the year 1987 and that in 1989?

Following table shows the percentage of boys and difference between the number of boys and the number of girls among the students of six different schools who appeared in board examination in different years.

What is the ratio of the total number of boys appeared from School C in 1986 to the total number of girls appeared from School E in the year 1988?

Following table shows the percentage of boys and difference between the number of boys and the number of girls among the students of six different schools who appeared in board examination in different years.

Total number of students appearing from School F in the year 1986 is what per cent of the total number of students appearing from School C in the year 1986?