NDA Mathematics 21 April 2024 | Statistics Question 75 | Mathematics

An edible oil is sold at the rates 150, 200, 250, 300 rupees per litre in four consecutive years. Assuming that an equal amount of money is spent on oil by a family in every year during these years, what is the average price of oil in rupees (approximately) per litre?

210

220

230

240

NDA Mathematics 21 April 2024

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following for the next two (02) items that follow:

$x_i$	1	2	3	...	$n$
$f_i$	1	$2^{-1}$	$2^{-2}$	...	$2^{-(n-1)}$

$$ \text { What is } \sum_i^n x_i f_i \text { equal to? } $$

$\frac{2^{n+1} - n + 2}{2^{n-1}}$

$\frac{2^{n+1} - n - 2}{2^{n-1}}$

$\frac{2^{n+1}+n+2}{2^{n-1}}$

$\frac{2^{n+1}-n-2}{2^n}$

NDA Mathematics 21 April 2024

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following for the next two (02) items that follow:

$x_i$	1	2	3	...	$n$
$f_i$	1	$2^{-1}$	$2^{-2}$	...	$2^{-(n-1)}$

What is the mean of the distribution?

$\frac{2^{n+1} - n + 2}{2^{n}-1}$

$\frac{2^{n+1} - n - 2}{2^{n-1}}$

$\frac{2^{n+1} - n - 2}{2^{n}-1}$

$\frac{2^{n+1} - n + 2}{2^n}$

NDA Mathematics 21 April 2024

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following for the next two (02) items that follow:

The marks obtained by 10 students in a Statistics test are 24, 47, 18, 32, 19, 15, 21, 35, 50 and 41.

What is the mean deviation of the largest five observations?

4.8

5.5

7.5

Previous Next

Questions Asked from Marks 2.5

NDA Mathematics 1st September 2024 (4) NDA Mathematics 21 April 2024 (7) NDA Mathematics 3 September 2023 (4) NDA Mathematics 16 April 2023 (8) NDA Mathematics 4 September 2022 (6) NDA Mathematics 10 April 2022 (9) NDA Mathematics 14 November 2021 (11) NDA Mathematics 18 April 2021 (12)