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Answer:
<h2>See the explanation.</h2>Step-by-step explanation:
It is told that, 330 students that are surveyed, are 9th graders.
Hence, 0.55 represents 330 students, that is 1 represents = 600 students.
The number of 9th grade students whose favorite elective is music is represented by 0.18.
1 ≡ 600
0.18 ≡ = 108.
The percentage of students whose favorite elective is home economics and are also in 10th grade is = 6%.