Math

posted by .

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.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    In Janis class, half of the students are girls and 60% of the students have brown eyes. If a student is chosen at random, what is the probability that the student will be a girl with brown eyes?
  2. math

    IF 7/12 CLASS HAS BROWN HAIR 2/12 HAS RED HAIR ,WHAT FRACTION MORE OF THE STUDENTS HAVE BROWN HAIR THAN RED HAIR, I GOT AN ANSWER OF 7/12 AM I CORRECT
  3. math

    in a class one quarter of students have blonde hair and brown eyes and one third have brown eyes and blonde hair what fraction of the class in total have brown eyes
  4. math

    There are x students in Mrs. Schwartz's third-grade class. One less than half the students have blue eyes. Six fewer children have green eyes than have blue eyes. The rest of the students have brown eyes. How many students have brown …
  5. Math

    The ratio of the number of boys to the number of girls in Mr. Brown's class is 5:4. Which of the following can be calculated using the information given?
  6. Comm Tech

    Name Age Gender Eye Color Hair C. 1.)Bob 40 M Brown Blonde 3.)Cathy 37 F Brown Blonde 4.)Samantha 51 F Brown Brown 5.)Robin 46 F Brown Black 3.)What is the frequency of brown-haired people in the sample ?
  7. math/technology

    What is the frequency of brown-haired people in the sample?
  8. math

    In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes.
  9. Math

    *Edited* (thanks Alex!) In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes. Question: What fraction of the girls in the …
  10. math

    In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes. How many of of the girls with long brown hair have green eyes. 3/5 …

More Similar Questions