in a class of 40 the ratio of boys to girls is 7 to 3. How many more boys than girls are in the class?
x/40 = 7/10
10x = 280
x = 28 boys
40 - 28 = 12 girls
28 - 12 = ?
That means for every 10 students, 7 will be boys and 3 will be girls. 40 = 4*10
Therefore 4 * 7 = ? boys and
4 * 3 = ? girls
Subtract girls from boys.
To find out how many more boys than girls are in the class, we first need to determine the number of boys and girls in the class.
Given that the ratio of boys to girls is 7 to 3, we can calculate the number of boys and girls as follows:
Number of boys = (7 / 10) * Total number of students
Number of girls = (3 / 10) * Total number of students
In this case, the total number of students is given as 40, so we can substitute this value into the equations:
Number of boys = (7 / 10) * 40 = 28
Number of girls = (3 / 10) * 40 = 12
Now that we have the number of boys and girls, we can determine the difference:
Difference = Number of boys - Number of girls = 28 - 12 = 16
Therefore, there are 16 more boys than girls in the class.