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

Total Questions: 50

31. Find the median of the given data. 20, 28, 32, 48, 20, 18, 16, 2, 30, 14 [RRB NTPC 21/03/2021 (Evening)]

Correct Answer: (c) 20
Solution:

32. Find the median of the given data. 25, 18, 20, 16, 8, 10, 15, 20, 13, 30 [RRB NTPC 27/03/2021 (Morning)]

Correct Answer: (b) 17
Solution:

33. The given data is arranged in ascending order. The median of the data is 63. Find the value of x. 29, 32, 48, 50, x, x + 2, 72, 78, 84, 95 [RRB NTPC 27/03/2021 (Morning)]

Correct Answer: (a) 62
Solution:

34. The median of observations k − 3/2, k + 2, k − 1, k + 4, k + 1/2, k − 3, k + 4 1/2 is ______. [RRB NTPC 01/04/2021 (Evening)]

Correct Answer: (b) k + 1/2
Solution:

35. Find the sum of the mean, the median and the mode of the given data.10, 8, 18, 12, 12, 12 [RRB NTPC 03/04/2021 (Evening)]

Correct Answer: (c) 36
Solution:

36. In the given data, if 22 is replaced by 52, find the difference between two medians. 26, 15, 8, 32, 18, 22 [RRB NTPC 03/04/2021 (Evening)]

Correct Answer: (a) 2
Solution:

37. A raw data is in ascending order i.e. 3, 4, 8, x, x + 1, 12, 14, 15. If the median of this data is 9.5, then the value of x is: [RRB NTPC 05/04/2021 (Morning)]

Correct Answer: (b) 9
Solution:

38. Given data is arranged in an ascending order. If the median is 10, then find the value of p. 3, 5, 6, 2p + 3, 3p + 2, 15, 25, 51. [RRB NTPC 06/04/2021 (Evening) ]

Correct Answer: (a) 3
Solution:

39. Histogram is used to find: [RRB NTPC 07/04/2021 (Evening)]

Correct Answer: (d) mode graphically
Solution:

The histogram is a popular graphing tool. It is used to summarize discrete or continuous data that are measured on an interval scale. First described by Karl Pearson.

40. Read the given data and answer the question that follows. 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21, 17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25. If the given data is grouped in the classes 0–5, 5–10, 10–15, and so on, then what will be the frequency of the class 20–25? [RRB NTPC 07/04/2021 (Evening)]

Correct Answer: (b) 3
Solution:

2,5,15,25,20,12,8,7,6,16,21,17, 30,32,23,40,51,15,2,9,57,19,25. The numbers lies between 20 - 25 = (20, 21, 23) The frequency of class 20 - 25 = 3