Math

posted by .

Ms. Poole, my PE teacher, asked the 100 seventh in my school if they could swim. Half the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?

  • Math -

    17 boys do not know how to swim. Therefore, 17 boys do swim.

    100 - 34 = 66 girls

    2/3 * 66 = 132/3 = 44

    44 + 17 = ?

  • Math -

    Easy. Ok
    "Half the boys said....yes" which means half said no. 17 said no so that means 17 out of 34 boys know to swim. Now for the girls, we know there are 34 boys so that leaves 66 girls total. 66 multiplied by 2/3 is 44. (44 girls said yes.) 44+34= 78.

    Therefore 78 seventh graders know how to swim

  • Math -

    (actually sorry, it's 17+44, I made a mistake. That is equal to 61)

  • Math -

    Half the boys said yes so half said yes. 17 boys said no so the other half said yes so 17 boys said yes. 17 + 17 = 34 boys total. Now 100 students take away 34 boys (students) which now leaves 66 students (girls) total.
    now 2/3 of 66 is 44 because 22 times 3 = 66. so Now 44 girls said yes and 17 boys said yes so 44 + 17 = 61 seventh graders know how to swim.

  • Math -

    Half the boys said yes so that means 17 boys said no. 17+17= 34 boys. 100 students minus 34 boys equals 66 girls. Now, 2/3 of 66 is 44 because 22 times 3= 66. So that means that 44 girls said yes and 17 boys said yes so 44+17= 61 seventh graders that know how to swim.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    my P.E. teacher asked the 100 seventh graders in my school if they could swim. Half of the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?
  2. algebra

    There are 384 seventh graders at MArk's school. If there are 48 more girls than boys, how many seventh grade girls are there?
  3. Math

    If the ratio of girls to boys on the swim team is 2:3, which of these shows the possible number of girls to boys: A. 20 girls, 35 boys B. 24 girls, 36 boys
  4. math

    A soccer team consists of girls from sixth, seventh, and eighth grades. If 4/10 of the girls on the team are eighth graders and 5/10 are seventh graders, what fraction of the girls ae either seventh or eighth graders?
  5. math

    A soccer team consists of girls from sixth, seventh, and eighth grades. If 4/10 of the girls on the team are eighth graders and 5/10 are seventh graders, what fraction of the girls ae either seventh or eighth graders?
  6. Math

    A math class has girls and boys in the seventh grade and girls and boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students …
  7. Math

    Nicole drew a circle on the chalkboard that had a radius of 15 cm. Which is closest to the circumference in centimeters of the circle she drew on the board?
  8. Math

    A science class has 3 girls and 3 boys in the seventh grade and 4 girls and 1 boy in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that …
  9. Algebra

    A math class has 7 girls and 5 boys in the seventh grade and 4 girls and 4 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that …
  10. Math

    A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boysin the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that …

More Similar Questions