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Question
The strength of a class is 65, including 30 girls. Find the ratio of the number of:
(i) girls to boys
(ii) boys to the whole class
(iii) the whole class to girls
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Solution
Total strength of class (including boys and girls) = 65
Number of girls = 30
Number of boys = (65 – 30) = 35
(i) Ratio between girls and boys
`=30:35=30/35=6/7=6:7`
(ii) Ratio between boys and whole class
`35:65=35/65=7/13=7:13`
(iii) Ratio between whole class and girls
`65:30=65/30=13/6=13:6`
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