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iluminatioffial9699
14.07.2019 •
Mathematics
How to describe a situation for a qualitative graph?
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Ответ:
60
Given,
Ratio of Girls:Boys (G:B) = 7:5
Also, number of girls = 10 + number of boys
G = 10 + B
G/B = 7/5
(10+B)/B = 7/5
50 + 5 B = 7B
2B = 50
B = 25
G = 10 + B = 35..
A. Number of girls = 35
B. Number of boys = 25
C. Total students = 60
OR
Given G:B = 7:5
Difference between number of girls and boys = 10
Ratio difference = 2 parts (7-5=2)
2 parts===10
1 part ===5
7 parts(gilrs) == 7*5 = 35
5 parts (boys) == 5*5 =25
12 parts(total) = 5*12 = 60.