Study the given chart and answer the question that follows.

The following chart shows the production of textbooks in thousands in the years2018, 2020 and 2022 from the print houses A, B and C, respectively.

The ratio of textbooks produced by Print house B in the year 2018 to the textbooks produced by Print house C in the year 2020 is ______.

Study the following histogram and answer the question :

(Note: The number of lamps is a multiple of 5)
The difference between the total number of neon lamps whose life time is 400 hours or more but less than 700 hours and the total number of neon lamps whose life time is 900 hours or more is t. The value of t lies between :

Study the following graph and answer the question given below.Imports and exports of a country during 2020 to 2024 

By what percent is the total imports of the country during 2022 and 2023 less than the total exports during2020, 2021 and 2024?

Study the given graph carefully and answer the given question.
The graph shows the number of students appeared and passed in class XI final exams in a school in different years.

In which year the pass percentage is the highest?
[pass percentage =(No. of students passed/Number of students appeared in exam)× 100]

Study the following graph to answer the question.

India’s exports to which of the following regions increased most in terms of percentage between 2000-01 and 2010 – 2011?