Study the histogram and answer the question given below.
The grpah represents the number of students obtaining a % of marks in class X in 2018 in a school.
The nunber of studests who have secured less than 60% marks is what per cent less than the number of students who have secured 80% marks and above?
The following pie charts show the number of students studying in different departments of an institution during 2019 and 2020. The total number of students was 2000 and 2400 respectively, In the year 2019 and 2020.
What is the ratio of Commerce and Computer Science students taken together in 2019 to Engineering and Medical students taken together in 2020?