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March 30, 2017

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Half of the students in Sonia's class are girls. Half of the girls have brown hair. Half of the brown haired girls have brown eyes. There are 4 girls with brown hair and brown eyes. How many students are in Sonia's class?

  • Math - ,

    (1/2)(1/2)(1/2)n = 4
    1/8n = 4
    n = 4 / (1/8)
    n = 4 * (8/1)
    n = ?

  • Math - ,

    32 students in Sonia's class

  • Math - ,

    Right.

  • Math - ,

    Work backwards from four and use the halves.

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