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ICSE Class X Math 2016 Paper

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The table shows the distribution of the scores obtained by 160 shooters in a shooting competition. Use a graph sheet and draw an ogive for the distribution.
(Take 2 cm=102\,\mathrm{cm}=10 scores on the XX axis and 2 c m=20c\,m=20 shooters on the YY-axis).
 Scores  No. of shooters
 0-10  9
 10-20  13
 20-30  20
 30-40  26
 40-50  30
 50-60  22
 60-70  15
 70-80  10
 80-90  8
 90-100  7
Use your graph to estimate the following :
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Question : 32 of 57
Marks: +1, -0
The number of shooters who obtained a score of more than 85%85\%
Solution:  
The number of shooter who obtained a score of more 85%85\% , from EE draw a vertical line to meet ogive at F. From F draw a horizontal line to DD.
=160−150=10=160-150=10
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