arithmetic

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a class of 80 is 25% girls.if 10% of the boys and 20% of the girls attended a picnic, what percent of the class attended?

  • arithmetic -

    25% of 80 is 20
    so, there are 20 girls and 60 boys

    10% of the boys is 6
    20% of the girls is 4

    so, I guess you can figure out how many attended . . .

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