Question

seventh grade students
instrument | # of students
guitar | 5
bass | 12
drums | 14
keyboard | 4
eighth grade students
instrument | # of students
guitar | 12
bass | 5
drums | 10
keyboard | 8
based on these results, express the probability that a student chosen at random will play the drums as a percent to the nearest whole number.

Explanation:

Step1: Calculate total number of students

$5 + 12+14 + 4+12 + 5+10 + 8=70$

Step2: Calculate number of students who play drums

$14 + 10=24$

Step3: Calculate probability as a fraction

The probability $P$ that a student plays drums is $P=\frac{24}{70}$

Step4: Convert fraction to percentage

$P=\frac{24}{70}\times100\%=\frac{2400}{70}\% \approx 34\%$

Answer:

$34$