Directions : Study the following frequency polygon and answer the questions. Given a line graph showing the number of students passed in Higher Secondary Examination in a school over the years 2008 to 2013.

The decrease in percentage of passed students from 2011 to 2012 approximately is 

Directions : Study the following frequency polygon and answer the questions. Given a line graph showing the number of students passed in Higher Secondary Examination in a school over the years 2008 to 2013.

The increase in percentage of passed students from 2008 to 2011 approximately is 

Directions : Study the following frequency polygon and answer the questions. Given a line graph showing the number of students passed in Higher Secondary Examination in a school over the years 2008 to 2013.

The average of passed students in the years 2008, 2009, 2012 approximately is 

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

When the heights of the given peaks are written in ascending order, what is the average of the middle two peaks? 

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

What is the respective ratio of the heights of the highest peak and the lowest peak? 

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

Which peak is the second highest ? 

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

The average height of all the peaks (in metre) is 

A bag contains rupee, 50 - paise and 25 - paise coins in the ratio 2 : 3 : 4. If the total amount in the bag is Rs . 45, find the number of 50 - paise coins.