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Standard IX

Mathematics

Graphical Representation of Quantitative Data

The red line ...

Question

The red line indicates the girl's height distribution. The blue line indicates the boy's height distribution.

i) Maximum no. of girls belong to which height group?

ii) The difference between the number of boys to the number of girls is_______.

140-150, 1

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150-160, 2

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160-170, 0

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170-180, Not enough data

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Solution

The correct option is C
160-170, 0

i) According to the graph, there are 7 girls in the height group 160-170 which is the highest.

ii) Total number of boys=4+3+2+4+3=16

Total number of girls= 1+7+6+2=16

The difference between number of boys to number of girls = 16-16=0

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Similar questions

Q. A survey regarding the heights (in cm) of 50 girls of a class was conducted and the following data was obtained:

Height in cm	120-130	130-140	140-150	150-160	160-170	Total
Number of girls	2	8	12	20	8	50

Find the mean, median and mode of the above data.

The red line indicates the girls height distribution. The blue line indicates the boys height distribution.

Find:

i) Maximum no. of girls belong to which height group ?

ii) The difference in the no. of boys to the no. of girls in the class.

Q. The following table shows the heights

(c m)

50

girls of class

X

of a school.

Height $(c m)$	Number of girls
$120 - 130$	$2$
$130 - 140$	$8$
$140 - 150$	$12$
$150 - 160$	$20$
$160 - 170$	$8$
$T o t a l$	$50$

Find the mean of the above data by step deviation method.

Q. Use Graph paper for this question. A Survey regarding height (in cm ) of

60

boys belonging to Class

10

of a school was conducted. The following data was recorded.

Height in cm	$135 - 140$	$140 - 145$	$145 - 150$	$150 - 155$	$155 - 160$	$160 - 165$	$165 - 170$
No. of boys	$4$	$8$	$20$	$14$	$7$	$6$	$1$

Taking

2

=

height of

10

cm along one axis and

2

= 10

boys along the other axis draw an ogive of the distribution. Use the graph to estimate the median.

The height (in cm) of members of a society were recorded as :

$160, 165, 145, 160, 170, 150, 160, 180, 150, 155, 160, 165, 175, 150, 170, 180, 165, 150, 170, 160, 175, 180, 150, 160, 170, 180, 180, 160, 150, 175, 160, 150, 140, 150, 150, 170, 180, 150, 175, 165, 175, 175, 180, 145, 150, 155, 170, 180, 170, 145, 175, 160 .$

Arrange the data in tabular form using tally marks.

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The red line indicates the girl's height distribution. The blue line indicates the boy's height distribution. i) Maximum no. of girls belong to which height group? ii) The difference between the number of boys to the number of girls is_______.

The correct option is C 160-170, 0 i) According to the graph, there are 7 girls in the height group 160-170 which is the highest. ii) Total number of boys=4+3+2+4+3=16 Total number of girls= 1+7+6+2=16 The difference between number of boys to number of girls = 16-16=0

The red line indicates the girl's height distribution. The blue line indicates the boy's height distribution.

i) Maximum no. of girls belong to which height group?

ii) The difference between the number of boys to the number of girls is_______.

The correct option is C
160-170, 0

i) According to the graph, there are 7 girls in the height group 160-170 which is the highest.

ii) Total number of boys=4+3+2+4+3=16

Total number of girls= 1+7+6+2=16

The difference between number of boys to number of girls = 16-16=0