colton recorded the grade - level and instrument of everyone in the middle school school of rock…

colton recorded the grade - level and instrument of everyone in the middle school school of rock below.\nseventh grade students\n|instrument|# of students|\n|--|--|\n|guitar|12|\n|bass|14|\n|drums|5|\n|keyboard|4|\neighth grade students\n|instrument|# of students|\n|--|--|\n|guitar|9|\n|bass|10|\n|drums|3|\n|keyboard|6|\nbased on these results, express the probability that a student chosen at random will play the bass as a fraction in simplest form.\nanswer attempt 1 out of 2\nsubmit answer

colton recorded the grade - level and instrument of everyone in the middle school school of rock below.\nseventh grade students\n|instrument|# of students|\n|--|--|\n|guitar|12|\n|bass|14|\n|drums|5|\n|keyboard|4|\neighth grade students\n|instrument|# of students|\n|--|--|\n|guitar|9|\n|bass|10|\n|drums|3|\n|keyboard|6|\nbased on these results, express the probability that a student chosen at random will play the bass as a fraction in simplest form.\nanswer attempt 1 out of 2\nsubmit answer

Answer

Explanation:

Step1: Calcular el total de estudiantes

Sumamos el número de estudiantes de cada instrumento y grado. Sieteavo grado: $12 + 14+5 + 4=35$ estudiantes. Octavo grado: $9 + 10+3 + 6=28$ estudiantes. Total de estudiantes: $35 + 28 = 63$ estudiantes.

Step2: Calcular el número de estudiantes que tocan el bajo

Sumamos el número de estudiantes que tocan el bajo en séptimo y octavo grado. $14+10 = 24$ estudiantes tocan el bajo.

Step3: Calcular la probabilidad

La probabilidad $P$ de que un estudiante elegido al azar toque el bajo es el número de estudiantes que tocan el bajo dividido por el total de estudiantes. $P=\frac{24}{63}$ Simplificamos la fracción dividiendo numerador y denominador por 3: $\frac{24\div3}{63\div3}=\frac{8}{21}$

Answer:

$\frac{8}{21}$