Mean, Median & Mode (Railway Maths) (Part – II)

Total Questions: 50

21. Find the median of the given frequency distribution. [Group D 26/09/2022 (Evening) ]

Correct Answer: (c) 265/9
Solution:

22. The nominal marks obtained by students who appeared in a test are given below. Find the median marks of the students. [Group D 27/09/2022 (Afternoon) ]

Correct Answer: (c) 13.5
Solution:

23. Find the arithmetic mean of the following data. [Group D 27/09/2022 (Evening) ]

Correct Answer: (a) 15.5
Solution:

24. The following are the marks obtained in a test out of 20 by a group of 10 students. Find the mode of the data. 15, 12, 13, 14, 16, 15, 18, 19, 11, 15 [Group D 28/09/2022 (Afternoon) ]

Correct Answer: (b) 15
Solution:

Given data : 15, 12, 13, 14, 16, 15, 18, 19, 11, 15 as Mode is the most frequent number ∴ Mode = 15

25. Find the arithmetic mean of the following data. 12, 13, 18, 12, 15, 15, 16, 13, 19, 17 [Group D 28/09/2022 (Afternoon) ]

Correct Answer: (d) 15
Solution:

26. Find the mode of the given frequency distribution [Group D 30/09/2022 (Evening) ]

Correct Answer: (d) 40
Solution:

The most frequent number is called mode In this frequency distribution chart Mode = 40, which have most frequency i.e 7 .

27. The median of the data 9, 12, 11, 8, 16, 18, 10, 14, 15, 13, 17, 20, 2, 24 is x. If 2 and 8 are replaced by 21 and 18 in this data, respectively, then the median of the data so obtained is y. What is the value of (3x – y)? [Group D 06/10/2022 (Afternoon)]

Correct Answer: (b) 25
Solution:

28. If the mean and the mode of a data set are 5 and 8, respectively, then, using the relevant empirical relation, find the median of the same data set. [Group D 07/10/2022 (Morning)]

Correct Answer: (a) 6
Solution:

29. The median of the following data is 28.5. The total frequency is 60. The values of x and y, respectively, are: [Group D 07/10/2022 (Morning) ]

Correct Answer: (c) x = 8, y = 7
Solution:

30. The variable X takes values 3 and 7, with frequencies of K and K – 2, respectively. If the arithmetic mean of X is 4, then the value of K is: [Group D 11/10/2022 (Morning) ]

Correct Answer: (d) 3
Solution: