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

zendaya 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|7|\n|bass|15|\n|drums|12|\n|keyboard|6|\neighth grade students\n|instrument|# of students|\n|--|--|\n|guitar|7|\n|bass|13|\n|drums|8|\n|keyboard|12|\nbased on these results, express the probability that an eighth grader chosen at random will play the drums as a percent to the nearest whole number.

zendaya 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|7|\n|bass|15|\n|drums|12|\n|keyboard|6|\neighth grade students\n|instrument|# of students|\n|--|--|\n|guitar|7|\n|bass|13|\n|drums|8|\n|keyboard|12|\nbased on these results, express the probability that an eighth grader chosen at random will play the drums as a percent to the nearest whole number.

Answer

Explanation:

Step1: Calculate total number of eighth - graders

Add the number of students playing each instrument in eighth - grade. So, $7 + 13+8 + 12=40$.

Step2: Calculate the probability of an eighth - grader playing drums

The number of eighth - graders playing drums is 8. The probability $P$ is the number of favorable outcomes (students playing drums) divided by the total number of outcomes (total eighth - graders). So, $P=\frac{8}{40}$.

Step3: Convert the probability to a percentage

Multiply the probability by 100. $\frac{8}{40}\times100 = 20%$.

Answer:

20%