Answer:
a) false
b) True
c) True
d) false
Explanation:
Ella's grade:
Ratio of boys to girls = 3:4
Total number of boys and girls = 3+4 = 7
Since Each grade has a total of 20 girls.
Let total number of boys and girls = x
Proportion of girls: (4/7) × x = 20
4x/7 = 20
x = 35
Total number of boys and girls = 35
Number of boys = 35-20 = 15 boys
Minh's grade:
Ratio of boys to girls = 4:5
Total number of boys and girls = 4+5 = 9
Let total number of boys and girls = x
Proportion of girls: (5/9) × x = 20
5x/9 = 20
x = 36
Total number of boys and girls = 36
Number of boys = 36-20 = 16 boys
a) Ella's grade has more boys than Minh's grade.
15 boys < 16boys = boys in Ella's grade < boys in Minh's grade
False
b) Minh's grade has more boys than Ella's grade.
boys in Minh's grade > boys in Ella's grade
True
c) Ella's grade has 15 boys.
True
d) Minh's grade has 8 boys.
False