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mastertrapper
28.10.2019 •
Mathematics
Ms.brady has 28 students in her class.the ratio of boys to girls in the class is 2 to 5.how many new boys must be added to the class to make the ratio of boys to girls 1 to 2?
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Ответ:
2/7(28) = 56/7 = 8 boys
5/7(28) = 140/7 = 20 girls
so right now, there is 8 boys and 20 girls (8/20 = 2/5)
so lets add 2 boys...making it 30 students
10 boys and 20 girls = 10/20 = 1/2 or 1 to 2
answer is : u have to add 2 boys to get a ratio of boys to girls = to 1:2
Ответ:
1000!
Step-by-step explanation:
We have 10 options for the first digit (0-9, inclusive)
We have 10 options for the second digit, too, because repetition is allowed.
We have 10 options for the third!
So!