1.

In a school, there are 720 students. If there are 300 boys, then find the ratio of the number of girls to that of boys.

Answer» Correct Answer - ` 7: 5`
(i) 2,3, 2016, 2019
` 2xx 2019 = 4038 `
` 3 xx 2016= 6048`
` 2xx 2019 ne 3 xx 2016`
Hence, 2,3, 2016 and 2019 are not in proportion.
(ii) 12 , 15 , 32 , 40
` 12 xx 40 = 480`
` 15 xx 32 = 480`
` 12 xx 40 = 15 xx 32`
Hence, 12, 15 , 32 and 40 are in proportion.


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