NDA Mathematics 10 April 2022 | Statistics Question 103 | Mathematics

The algebraic sum of the deviations of a set of values x₁, x₂, x₃, ⋯, x_n measured from 100 is -20 and the algebraic sum of the deviations of the same set of values measured from 92 is 140.

If the algebraic sum of the deviations of the same set of values measured from y is 180, then what is the value of y ?

NDA Mathematics 10 April 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following frequency distribution for the next three (03) items follow :

Class	0-20	20-40	40-60	60-80	80-100
Frequency	17	p + q	32	p - 3q	19

The total frequency is 120. The mean is 50.

What is the value of p ?

NDA Mathematics 10 April 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following frequency distribution for the next three (03) items follow :

Class	0-20	20-40	40-60	60-80	80-100
Frequency	17	p + q	32	p - 3q	19

The total frequency is 120. The mean is 50.

What is the value of q ?

NDA Mathematics 10 April 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following frequency distribution for the next three (03) items follow :

Class	0-20	20-40	40-60	60-80	80-100
Frequency	17	p + q	32	p - 3q	19

The total frequency is 120. The mean is 50.

If the frequency of each class is doubled, then what would be the mean?

100

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