Note: The following question follows a definite pattern. Observe the same and fill in the blank with suitable answer.
$$\frac{1}{a - b}, \frac{1}{a^{2} - b^{2}},\frac{1}{(a + b)^{2}(a - b)},\frac{1}{(a + b)^{2}(a^{2} - b^{2})},\frac{1}{(a + b)^{3}(a^{2} - b^{2})}$$
Note:
The following table gives the number of students admitted into various courses of a university. Using this data, answer the questions.
Taking all the four years into consideration, in which course there were maximum number of admissions?
What is the percentage increase in admissions of mathematics in 2019 compared to 2016 (approximately)?
What is the ratio of the nu1nber of students admitted into the university in 2017 to that of 2019?
Note: The following Pie chart shows bow the municipal funds are spent under different heads in a year. Study the chart carefully and answer the questions.