Children were asked about the nbsp-number of hours nbsp-they play- and nbsp-the responses have been recorded as follows- - No- of hours amp- nbsp-No- of children- 0-2 amp- 7- 2-4 amp- 11- 4-6 amp- 15- 6-8 amp- 9- 8-10 amp- 8- - nbsp- How nbsp-many nbsp-children participated in the survey-50

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Standard IX

Mathematics

Grouped Frequency Distribution Table

Children were...

Question

Children were asked about the number of hours they play, and the responses have been recorded as follows.
$\begin{matrix} N o . o f h o u r s & N o . o f c h i l d r e n 0 - 2 & 7 2 - 4 & 11 4 - 6 & 15 6 - 8 & 9 8 - 10 & 8 \end{matrix}$

How many children participated in the survey?
50

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Solution

The correct option is A 50
The number of children participated in the survey = 7+ 11 + 15 + 9 + 8 = 50.

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Q. Thirty children were asked about the number of hours they watched T.V. programmes in the previous week. The results were found as follows:

1	6	2	3	5	12	5	8	4	8
10	3	4	12	2	8	15	1	17	6
3	2	8	5	9	6	8	7	14	12

(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5-10.

(ii) How many children watched television for 15 or more hours a week?

Q. Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as under:
8, 4, 8, 5, 1, 6, 2, 5, 3, 12, 3, 10, 4, 12, 2, 8, 15, 1, 6, 17, 5, 8, 2, 3, 9, 6, 7, 8, 14, 12.
(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class interval as 5 –10.
(ii) How many children watched television for 15 or more hours a week?

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as under:
8, 4, 8, 5, 1, 6, 2, 5, 3, 12, 3, 10, 4, 12, 2, 8, 15, 1, 6, 17, 5, 8, 2, 3, 9, 6, 7, 8, 14, 12.

(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class interval as 5-10.

(ii) How many children watched television for 15 or more hours a week?

Q. Children were asked about the number of hours they play, and the responses have been recorded as follows.

\begin{matrix} N o . o f h o u r s & N o . o f c h i l d r e n 0 - 2 & 7 2 - 4 & 11 4 - 6 & 15 6 - 8 & 9 8 - 10 & 8 \end{matrix}

How many children participated in the survey?

Q. Children were asked about the number of hours they play, and the responses have been recorded as follows.

\begin{matrix} N o . o f h o u r s & N o . o f c h i l d r e n 0 - 2 & 7 2 - 4 & 11 4 - 6 & 15 6 - 8 & 9 8 - 10 & 8 \end{matrix}

How many children participated in the survey?

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Children were asked about the number of hours they play, and the responses have been recorded as follows. No.ofhoursNo.ofchildren0−272−4114−6156−898−108 How many children participated in the survey?50

The correct option is A 50The number of children participated in the survey = 7+ 11 + 15 + 9 + 8 = 50.

Children were asked about the number of hours they play, and the responses have been recorded as follows.
$\begin{matrix} N o . o f h o u r s & N o . o f c h i l d r e n 0 - 2 & 7 2 - 4 & 11 4 - 6 & 15 6 - 8 & 9 8 - 10 & 8 \end{matrix}$

How many children participated in the survey?
50

The correct option is A 50
The number of children participated in the survey = 7+ 11 + 15 + 9 + 8 = 50.