Question

In Mr. Johnson’s third and fourth period classes, 30% of the students scored a 95% or higher on a quiz.Let be the total number of students in Mr. Johnson’s classes. Answer the following questions, and showyour work to support your answer.If 15 students scored a 95% or higher, write an equation involving that relates the number ofstudents who scored a 95% or higher to the total number of students in Mr. Johnson’s third andfourth period classes. Of the students who scored below 95% 40% of them are girls. How many boys scored below 95%?

Answer 1

Total number of students = scored below 95% + scored above 95% (I)

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Students scored below 95%

Scored below 95%* 0.40 = girls

Boys = total scored below 95% (100% - 40%)

Boys = total scored below 95% (60%)

Boys = total scored below 95% (0.6) (II)

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Can you see the updates?

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30% of the students scored a 95% or higher on a quiz and 15 students scored a 95% or higher

Total number of students* 30 = 15

30%*n = 15

n= 15/ 0.3

n= 50

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Replacing in (I)

Total number of students = scored below 95% + scored above 95%

50 = 15 + 35

Replacing in (II)

Boys = 15 (0.60) = 9

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Answer

9 of the students who scored below 95% are boys