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Iarrecorded the grade-level and instrument of everyone in the middle school Schoolof Rock below.Seventh Grade StudentsEighth Grade StudentsInstrument # of StudentsInstrument # of Students1279GuitarBassDrumsKeyboard14GuitarBassDrumsKeyboard4355Based on these results, express the probability that a seventh grader chosen atrandom will play the drums as a decimal to the nearest hundredth.

Respuesta :

Let's take a look at the seventh graders table.

Seventh grade has a total of

[tex]12+9+4+5=30[/tex]

30 students.

Out of those 30 students, 4 play the drums. Therefore, the probability that a seventh grader chosen at random will play the drums is:

[tex]\frac{4}{30}\rightarrow\frac{2}{15}\rightarrow0.13[/tex]

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