MATHEMATICS MIDDLE SCHOOL

there are 148 juniors and 272 seniors attending prom this year. if there must be three chaperones per 60 students, how many chaperones are needed

Answers

Answer 1

Answer:

21 chaperones are needed for 420 students.

Step-by-step explanation:

No. of juniors = 148

No. of seniors = 272

Total = 148+272 = 420 students

3 chaperones = 60 students

1 chaperone = $(60)/(3)=20\ students$

Ratio of chaperon to students = 1:20

Let,

x be the number of chaperons for 420 students.

Ration of chaperones to students = x:420

Using proportion

Ratio of chaperones to students :: Ratio of chaperons to students

$1:20::x:420$

Product of mean = Product of extreme

$20*x=420*1\n20x=420\n$

Dividing both sides by 20

$(20x)/(20)=(420)/(20)\nx=21$

21 chaperones are needed for 420 students.

Keywords: ratio, proportion

Learn more about ratios at:

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Hope this helped! Have a great rest of your day! :)

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