Answer:
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Using the percentage concept, it is found that 25% of 6th graders are involved in the yearbook club.
<h3>What is a percentage?</h3>
The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

In this problem, 10 out of 10 + 24 + 6 = 40 6th graders are involved in the yearbook club, hence the corresponding percentage is given by:

More can be learned about percentages at brainly.com/question/10491646
Answer:
d.
Step-by-step explanation:
12+5+9+3+13+8=50=total
divide the total by the amount of 45-54s that liked the movie
9/50=0.18