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Lubov Fominskaja [6]
3 years ago
12

What is the average of 1/4 and 6/18

Mathematics
1 answer:
galina1969 [7]3 years ago
8 0

Answer:

7/24

Step-by-step explanation:

(1/4+6/18)/2=7/24

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erma4kov [3.2K]
Hello again!

Answer is 60%

————————

so, for this one you first figure out how many study French.

2/9 of 270 is 60 (simple method: 1/9 is 270 divided by 9, which is 30. So 2/9 is 1/9 multiplied by 2, which is 60).
60 are doing French.

Then use this in the ratio of French to Spanish (3:7) and you have 3 and 60 on the same side. You have to multiply 3 by 20 to get to 60 (or divide 60 by 20 to get 3).
So the number you use to do the same to the other side of the ratio is 20.

7 multiplied by 20 (or 7 multiplied by 10, then multiply that by 2) to get 140.
140 are doing Spanish.

Then take the French and Spanish from the big total and you get 270-140-60=70
70 are doing German.

Of these 70, 42 are boys. 70-42 gives 28 girls. 42/70 is the fraction of boys doing German. This is the same as 6/10 and to get a percentage you multiply the fraction by 10 so that the bottom of it is out of 100 (so that’s 60/100).

And 60/100 is the same as 60%.

So your answer is 60%
6 0
3 years ago
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