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

justin 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|8|\n|bass|9|\n|drums|3|\n|keyboard|6|\neighth grade students\n|instrument|# of students|\n|--|--|\n|guitar|5|\n|bass|4|\n|drums|9|\n|keyboard|10|\nbased on these results, express the probability that a seventh grader chosen at random will play the bass as a decimal to the nearest hundredth.

justin 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|8|\n|bass|9|\n|drums|3|\n|keyboard|6|\neighth grade students\n|instrument|# of students|\n|--|--|\n|guitar|5|\n|bass|4|\n|drums|9|\n|keyboard|10|\nbased on these results, express the probability that a seventh grader chosen at random will play the bass as a decimal to the nearest hundredth.

Answer

Explanation:

Step1: Calcular el total de estudiantes de séptimo grado

Sumamos el número de estudiantes que tocan cada instrumento en séptimo grado: $8 + 9+3 + 6=26$.

Step2: Calcular la probabilidad

El número de estudiantes de séptimo grado que tocan el bajo es 9. La probabilidad $P$ de que un estudiante de séptimo grado elegido al azar toque el bajo es $P=\frac{\text{estudiantes que tocan bajo}}{\text{total de estudiantes de séptimo grado}}=\frac{9}{26}$.

Step3: Convertir a decimal

$\frac{9}{26}\approx0.35$.

Answer:

$0.35$