Girls in science class account for one-third of the total number of students in their 3rd period class. 3 girls are absent today. Find the t

Question

Girls in science class account for one-third of the total number of students in their 3rd period class. 3 girls are absent today. Find the total number of students in the class if four girls attended class today.

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Delilah 2 months 2021-10-21T00:15:22+00:00 1 Answer 0 views 0

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    2021-10-21T00:17:10+00:00

    Answer:

    See Explanation

    Step-by-step explanation:

    The question isn’t clear enough. However, I’ll solve for the total number of students in science class and I’ll.also solve for the total number of students present in class.

    Given

    Proportion of girls = ⅓

    Number of girls absent = 3

    Number of girls present = 4

    Required

    Find the total number of students

    If 3 girls were absent and 4 were present, then there are total of 7 girls in science class.

    Let the number of students in the class be represented by y.

    ⅓ of the total number of students are girls;

    This means

    ⅓ of y = 7

    ⅓ * y = 7

    Multiply both sides by 3

    3 * ⅓ * y = 3 * 7

    y = 3 * 7

    y = 21.

    Hence, the total number of students in science class is 21

    Recall that 3 girls are absent;

    This means that 21 – 3 are presently in the class.

    21 – 3 = 18.

    Hence, 18 students are presently in class.

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45:7+7-4:2-5:5*4+35:2 =? ( )