There are 175 grade 6 pupils, 3/7 are girls. How many are boys?
If 2/5 are boys then 3/5 are girls
These added together equal 5/5 which is the total number in the class ( 45 in this example )
45 divided by 5 equals 9
3 fifths would be 3 x 9 = 27 girls
The other way is to let x = number of girls
multiply 45 ( total # students) by (3/5)
x = 45 (3/5)
x = 135/5 = 27 girls
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Answers & Comments
Question :
There are 175 grade 6 pupils, 3/7 are girls. How many are boys?
Answer and Solution :
If 2/5 are boys then 3/5 are girls
These added together equal 5/5 which is the total number in the class ( 45 in this example )
45 divided by 5 equals 9
3 fifths would be 3 x 9 = 27 girls
The other way is to let x = number of girls
multiply 45 ( total # students) by (3/5)
x = 45 (3/5)
x = 135/5 = 27 girls
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