Question

question
avani recorded the grade - level and instrument of everyone in the middle school school of rock below.
seventh grade students

instrument	# of students
bass	9
drums	7
keyboard	2

eighth grade students

instrument	# of students
bass	9
drums	15
keyboard	10

based on these results, express the probability that a seventh grader chosen at random will play an instrument other than bass as a decimal to the nearest hundredth.
answer attempt 1 out of 2

Explanation:

Step1: Calculate total 7th - grade students

$14 + 9+7 + 2=32$

Step2: Calculate 7th - grade students who play non - bass instruments

$14 + 7+2 = 23$

Step3: Calculate the probability

The probability $P=\frac{23}{32}= 0.71875\approx0.72$

Answer:

$0.72$