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18 November, 09:26

In a group of 80 children, there are three times as many boys as girls. How many are there?

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Answers (2)
  1. 18 November, 09:38
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    In the given question, there are several vital information's provided and they can be used to determine the required answer. Firstly it is already given that there are a total of 80 students in the group. It is also given that the number of boys is 3 times that of the number of girls. Then:

    Let us assume that the number of girls in the group = x

    Then the number of boys in the group = 3x

    Now we can put the above information's to gether to find the number of boys and girls.

    x + 3x = 80

    4x = 80

    x 80/4

    x = 20

    Then we can say that there are 20 girls in the group.

    The number of boys = 3x

    = 3 * 20

    = 60

    Then there are 60 boys in the group.
  2. 18 November, 09:46
    0
    b ... the number of boys

    g ... the number of girls

    80 children

    three times as many boys as girls ... 3 * g = b

    If you would like to know how many boys and girls are in a group of 80 children, you can calculate this using the following step:

    b + g = 80

    3 * g + g = 80

    4 * g = 80 / 4

    g = 80/4

    g = 20 girls

    b = 3 * g = 3 * 20 = 60 boys

    Result: There are 60 boys and 20 girls.
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