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I need help with this math question I already solved the first question but I don't understand the second.

I Need Help With This Math Question I Already Solved The First Question But I Dont Understand The Second class=

Sagot :

We can solve this question using cross multiplication,

If the number of students who sleep 6 hours a day increases by, this means we'll have a total of 6 students who sleep 6 hours a day.

We want the ratio to be same: 15%

Then we can write:

[tex]\frac{6}{N}=\frac{15\%}{100\%}[/tex]

6 students are the 15%, then N students are the 100%

Now solve for N:

[tex]\begin{gathered} 6·100=15·N \\ \end{gathered}[/tex][tex]N=\frac{600}{15}[/tex][tex]N=40[/tex]

The answer is 40 students are expected.

This is a reasonable answer, given that if the number of students who sleep 6 hours doubles, for the rate to remain the same, the total of students must double.

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