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24 June, 09:35

The Ratio of boys to girls in Ella's grade is 3 to 4

The ratio of boys to girls in Minh's grade is 4 to 5

Each grade has a total of 20 girls.

Ella's grade has more boys than Minh's grade. True or False

Minh's grade has more bos than Ella's grade. True or False

Ella's grade has 15 boys. True or False

Minh's grade has 8 boys. True or False

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Answers (1)
  1. 24 June, 09:53
    0
    a) false

    b) True

    c) True

    d) false

    Step-by-step explanation:

    Ella's grade:

    Ratio of boys to girls = 3:4

    Total number of boys and girls = 3+4 = 7

    Since Each grade has a total of 20 girls.

    Let total number of boys and girls = x

    Proportion of girls: (4/7) * x = 20

    4x/7 = 20

    x = 35

    Total number of boys and girls = 35

    Number of boys = 35-20 = 15 boys

    Minh's grade:

    Ratio of boys to girls = 4:5

    Total number of boys and girls = 4+5 = 9

    Let total number of boys and girls = x

    Proportion of girls: (5/9) * x = 20

    5x/9 = 20

    x = 36

    Total number of boys and girls = 36

    Number of boys = 36-20 = 16 boys

    a) Ella's grade has more boys than Minh's grade.

    15 boys < 16boys = boys in Ella's grade < boys in Minh's grade

    False

    b) Minh's grade has more boys than Ella's grade.

    boys in Minh's grade > boys in Ella's grade

    True

    c) Ella's grade has 15 boys.

    True

    d) Minh's grade has 8 boys.

    False
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