RS Aggarwal Solutions Class 9 Chapter 14 Statistics Solution

EXERCISE 14H

Question 1:
Arrange the given data in ascending order we have
0, 0, 1, 2, 3, 4, 5, 5, 6, 6, 6, 6
Let us prepare the following table:

Observations(x)	0	1	2	3	4	5	6
Frequency	2	1	1	1	1	2	4

As 6 ocurs the maximum number of times i.e. 4, mode = 6

Question 2:
Arranging the given data in ascending order , we have:
15, 20, 22, 23, 25, 25, 25, 27, 40
The frequency table of the data is :

Observations(x)	15	20	22	23	25	27	40
Frequency	1	1	1	1	3	1	1

As 25 ocurs the maximum number of times i.e. 3, mode = 25

Question 3:
Arranging the given data in ascending order , we have:
1, 1, 2, 3, 3, 4, 5, 5, 6, 6, 7, 8, 9, 9, 9, 9, 9,
The frequency table of the data is :

Observations(x)	1	2	3	4	5	6	7	8	9
Frequency	2	1	2	1	2	2	1	1	5

As 9, occurs the maximum number of times i.e. 5, mode = 9

Question 4:
Arranging the given data in ascending order , we have:
9, 19, 27, 28, 30, 32, 35, 50, 50, 50, 50, 60
The frequency table of the data is :

Observations(x)	9	19	27	28	30	32	35	50	60
Frequency	1	1	1	1	1	1	1	4	1

As 50, ocurs the maximum number of times i.e. 4, mode = 50
Thus, the modal score of the cricket player is 50.

Question 5:
Arranging the given data in ascending order , we have:
10, 10, 11, 11, 12, 12, 13, 14, 15, 17
We may prepare the table, given below:

Item(x)	Frequency(f)	Cumulative Frequency	f x
10 11 12 13 14 15 17	2 2 2 1 1 1 1	2 4 6 7 8 9 10	20 22 24 13 14 15 17
	N=10		\(\sum { f\times x } =125 \)

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Question 12: