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27-10-2016
Mathematics

contestada

the ratio of boys to girls at a school program is 3 to 7. how many girls and present if 690 students attend the program?

Respuesta :

28-10-2016

Total ratio = 3+7 = 10

Value of 1 ratio unit = 690/10 = 69

number of girls = 69*7 = 483

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