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2 December, 20:38

in niagra, ny there are 5 male citizens for every 7 female citizens. if the city has a total population of 396 people how many of those people are male

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  1. 3 December, 00:00
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    Let's assume number of males 5 * a = 5a

    number of females 7 * a = 7a

    As per question total population is 396

    therefore 5a + 7a = 396

    12a = 396

    a = 396:12

    a = 33

    Let's place the value of in the equation

    5a + 7a = 396

    5*33 + 7*33 = 396

    165 + 231 = 396

    so 165 of 396 are males
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