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Mathematics 7 Online
OpenStudy (anonymous):

if the ratio of boys to girls in a class is 4 to 5, what is the total number of the students in the class? Elaborate with explanation please.

Parth (parthkohli):

4 + 5 = 9.. So there are 9x number of students in the class as it's a multiple of 9. We always have a multiple after adding in ratios to get the total value.

OpenStudy (anonymous):

what are the total no. of students can u pls.. give!

Parth (parthkohli):

We cannot determine the exact number of students with this much info. But we know that the number is a multiple of 9 aka 9x

OpenStudy (anonymous):

45

Parth (parthkohli):

See, told you.

OpenStudy (anonymous):

this the only option there which is divisible by 9.

Parth (parthkohli):

45 is a multiple of 9 (y)

OpenStudy (anonymous):

\[45\over9\]

Parth (parthkohli):

4x + 5x = 45 9x = 45 x = 5 Girls are 4x = 20 Boys are 5x = 25

OpenStudy (anonymous):

Thank u so much parth.

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