KEAM SERIES Mathematics
Statistics
7 previous year questions.
Volume: 7 Ques
Yield: Medium
High-Yield Trend
2
2026 1
2025 1
2024 3
2021 Chapter Questions 7 MCQs
01
PYQ 2021
medium
mathematics ID: keam-202
If X is a random variable with E(X) = 6 and V(X) = 3, then E(X2) is equal to
1
33
2
36
3
39
4
42
5
27
02
PYQ 2021
medium
mathematics ID: keam-202
The variance of the data with and is
1
30
2
40
3
39
4
41
5
31
03
PYQ 2021
medium
mathematics ID: keam-202
Assume that n distinct values x1,x2,...,xn occur with frequencies . respectively, If and , then
1
35
2
45
3
48
4
42
5
40
04
PYQ 2024
medium
mathematics ID: keam-202
The standard deviation of a data set ( ) is 2. If then the mean of the data set is
1
2
3
4
5
05
PYQ 2025
medium
mathematics ID: keam-202
In a class there are students. The mean of marks obtained by these students in an exam is 65. If the mark of one student is increased from 50 to 75 and the new mean is 66, then the value of is equal to
1
10
2
15
3
20
4
25
5
30
06
PYQ 2026
medium
mathematics ID: keam-202
Let be the data with respective frequencies . If and the mean deviation from the mean is 10, then is equal to
1
55
2
50
3
36
4
40
5
25
07
PYQ 2026
medium
mathematics ID: keam-202
Consider the data . If where is the mean, then the standard deviation is approximately, equal to
1
6.452
2
9.126
3
8.136
4
9.145
5
7.111