Answer:
See below:
Step-by-step explanation:
So we know that there are 1,400 students in the school which tells us the limits.
What we can do with this information is pair every group of 3 boys and 4 girls into one group of 7 people.
Now that we know that 1 group has 7 people, we can divide 1,400 by 7 to get 200 such groups of such kinds.
Now that we know the groups, we can multiply 3 by 200 and 4 by 200 to get our answer of how many people are in the school.
That means there are 600 boys and 800 girls!
