Embibe Experts Solutions for Chapter: UPSC CDS (I) Previous Year Paper 2021, Exercise 1: Elementary Mathematics

What is the median of the following data?

$2, 3, -1, 2, 6, 8, 9$

What is the arthmetic mean of the first ten composite numbers?

The marks obtained by $5$ students are $21, 27, 19, 26, 32.$ Later on $5$ grace marks are added to each students. What are the average marks of the revised marks of the students?

Let $p$ be the mean of $m$ observation and $q$ be the mean of $n$ observation, where $p\le q$. If the combined mean of $\left(m+n\right)$ observations in $c$, then which one of the following is correct?

For the next four $\left(4\right)$ items, consider the following data with regard to different types (I, II, III, IV, V) of  multivitamin tablets produced in a company (in lakhs):

Which product is produced least over the years $2000-2005$?

For the next four $\left(4\right)$ items, consider the following data with regard to different types (I, II, III, IV, V) of  multivitamin tablets produced in a company (in lakhs):

In which one of the following pairs of years, the difference in total number of tablets produced between them is minimum?

For the next four $\left(4\right)$ items, consider the following data with regard to different types ($\mathrm{I}$, $\mathrm{II}$, $\mathrm{III}$, $\mathrm{IV}$, $\mathrm{V}$) of multivitamin tablets produced in a company (in lakhs):

The ratio of percentage drop in total production in $2004$ compared to $2001$ to that in $2000$ compared to $2001,$ is

For the next four $\left(4\right)$ items, consider the following data with regard to different types (I, II, III, IV, V) of  multivitamin tablets produced in a company (in lakhs):

In which year, the production of Type I is more than the sum of the production of Type III and Type IV?