1
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

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

The marks obtained by 60 students in a certain subject out of 75 are given below:

Marks Number of
Students
15 - 20 4
20 - 25 5
25 - 30  11
30 - 35 6
35 - 40 5
40 - 45 8
45 - 50 9
50 - 55 6
55 - 60 4
60 - 65 2
What is the mode?
A
27.27
B
27.73
C
27.93
D
28.27
2
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is the mean of natural numbers in the interval [15, 64]?
A
36.8
B
38.3
C
39.5
D
40.3
3
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

For the set of numbers x, x, x + 2, x + 3, x + 10 where x is a natural number, which of the following is/are correct?

1. Mean > Mode

2. Median > Mean

Select the correct answer using the code given below.

A
1 only
B
2 only
C
Both 1 and 2
D
Neither 1 nor 2
4
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
The mean of 10 observations is 5.5. If each observation is multiplied by 4 and subtracted from 44, then what is the new mean?
A
20
B
22
C
34
D
44
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