Q.1 What is the mean of the numbers 2, 4, 6, 8, 10?
4
5
6
7
Explanation - The mean is the sum of the values divided by the number of values. (2+4+6+8+10)/5 = 30/5 = 6.
Correct answer is: 6
Q.2 What is the median of the numbers 3, 5, 7, 9, 11?
5
7
9
6
Explanation - The median is the middle value when data is arranged. The middle number here is 7.
Correct answer is: 7
Q.3 Find the mode of the set: 2, 4, 4, 5, 7, 7, 7, 8.
4
5
7
8
Explanation - The mode is the most frequent value. Here, 7 appears 3 times, which is more than any other.
Correct answer is: 7
Q.4 If the mean of 5 numbers is 10, what is their total sum?
40
45
50
55
Explanation - Mean = Sum/Number of terms. So, Sum = Mean × Number of terms = 10 × 5 = 50.
Correct answer is: 50
Q.5 What is the mean of the first 5 natural numbers?
2
2.5
3
3.5
Explanation - The numbers are 1,2,3,4,5. Mean = (1+2+3+4+5)/5 = 15/5 = 3.
Correct answer is: 3
Q.6 The median of 8, 12, 10, 14, 16 is:
10
12
14
13
Explanation - Arranged: 8,10,12,14,16. The middle value is 12.
Correct answer is: 12
Q.7 The mode of 2, 3, 4, 4, 5, 6, 6, 6 is:
2
4
5
6
Explanation - The number 6 occurs 3 times, the highest frequency.
Correct answer is: 6
Q.8 What is the mean of 12, 18, 24?
16
18
20
22
Explanation - Mean = (12+18+24)/3 = 54/3 = 18.
Correct answer is: 18
Q.9 Which measure of central tendency is most affected by extreme values?
Mean
Median
Mode
All equally
Explanation - The mean uses all values and is pulled towards extreme values (outliers).
Correct answer is: Mean
Q.10 The mean of 20 observations is 15. If one observation was wrongly recorded as 18 instead of 8, the correct mean is:
14.5
15
14.8
14.6
Explanation - Correct sum = (15×20) - 18 + 8 = 300 - 10 = 290. Correct mean = 290/20 = 14.5.
Correct answer is: 14.5
Q.11 For data: 1, 2, 2, 3, 4, 5, 5, 5, 6, what is the mode?
2
3
5
6
Explanation - Mode is the most frequent. Here, 5 appears 3 times, the most.
Correct answer is: 5
Q.12 If the mean of 8 numbers is 7, what is the sum of the numbers?
49
56
63
64
Explanation - Sum = Mean × Number = 7 × 8 = 56.
Correct answer is: 56
Q.13 Find the median of 2, 4, 6, 8, 10, 12.
6
7
8
7.5
Explanation - For even terms, median = average of 3rd and 4th values. (6+8)/2 = 7.
Correct answer is: 7
Q.14 The mode of 5, 5, 6, 7, 8, 9, 10, 10, 10 is:
5
6
9
10
Explanation - The number 10 appears 3 times, the highest frequency.
Correct answer is: 10
Q.15 Which of these is NOT a measure of central tendency?
Mean
Median
Mode
Standard deviation
Explanation - Standard deviation measures spread, not central tendency.
Correct answer is: Standard deviation
Q.16 What is the mean of first 10 even numbers?
10
11
12
11.5
Explanation - First 10 even numbers: 2–20. Mean = (2+20)/2 = 11.
Correct answer is: 11
Q.17 Find the median of 3, 7, 9, 15, 20, 25, 30.
9
15
20
25
Explanation - Arranged already. Middle element (4th) is 15.
Correct answer is: 15
Q.18 Which measure of central tendency always exists for any data?
Mean
Median
Mode
All three
Explanation - Median always exists, but mode may not be unique and mean may not be meaningful for categorical data.
Correct answer is: Median
Q.19 What is the mean of 7, 14, 21, 28, 35?
20
21
22
23
Explanation - Mean = (7+14+21+28+35)/5 = 105/5 = 21.
Correct answer is: 21
Q.20 Find the mode of 11, 12, 13, 14, 15.
11
12
13
No mode
Explanation - All values occur once, so there is no mode.
Correct answer is: No mode
Q.21 The median of first 9 odd numbers is:
5
7
9
11
Explanation - First 9 odd numbers: 1–17. Median is 5th value = 9.
Correct answer is: 9
Q.22 The mean of 10 observations is 20. If each observation is increased by 5, the new mean is:
20
22
25
30
Explanation - Adding a constant to each observation increases the mean by the same constant. So, 20+5 = 25.
Correct answer is: 25
Q.23 Which measure of central tendency is preferred for categorical data?
Mean
Median
Mode
None
Explanation - Mode is suitable for categorical data as it identifies the most common category.
Correct answer is: Mode
Q.24 The mean of 5, 10, 15, 20, 25, 30 is:
15
17.5
20
22.5
Explanation - Sum = 105. Mean = 105/6 = 17.5.
Correct answer is: 17.5
Q.25 Find the median of 1, 3, 5, 7, 9, 11, 13, 15.
7
8
9
8.5
Explanation - Median = average of 4th and 5th terms = (7+9)/2 = 8.
Correct answer is: 8