Directions: Study the following information to answer the given questions.
 
Percentage of students in various courses (A, B, C, D, E, F) in pie chart I and Percentage of girls in pie chart II.

Total students 1200 (800 girls + 400 boys)


Chart I


Chart II


 
1
For course D, what is the respective ratio of boys and girls?
» Explain it
A
Total no. of students for course D = 35% of 1200 = 420
 
No. of girl students for course D = 30% of 800 = 240
 
No. of boy students for course D = 420 – 240 = 180
 
Required ratio = 180 : 240 = 3 : 4
2
For which pair of courses is the number of boys the same?
» Explain it
C
Total no. of students in A = 20% of 1200 = 240
 
Total no. of girls in A = 30% of 800 = 240
 
Therefore, no. of boys in course A= 240 – 240 = 0. 
 
Similarly, we get 
 
in B = 100 
 
in C = 44 
 
in D = 180 
 
in E = 32 
 
in F = 44 
 
Hence, pair C & F of course is the number of boys the same.
3
For course E, the number of girls is how much per cent more than the number of boys for course E?
» Explain it
A
Total no. of students in course = 12% of 1200 = 144

No. of girls for course E = 14% of 800 = 112

No. of boys for course E = 144 – 112 = 32

Required % =  112 – 32  × 100 = 250%
32
4
For which course is the number of boys the minimum?
» Explain it
D
Total no. of students in A = 20% of 1200 = 240
 
Total no. of girls in A = 30% of 800 = 240
 
Therefore, no. of boys in course A= 240 – 240 = 0. 
 
Similarly, we get 
 
in B = 100 
 
in C = 44 
 
in D = 180 
 
in E = 32 
 
in F = 44 
 
Hence, in course A is the no. of boys minimum.
5
How many girls are there in course C?
» Explain it
B
Required no. of girls = 2% of 800

=    2 × 800  = 16
100

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