In a school, the ratio of boys to girls is 3 : 2. If 20 more boys are admitted and 10 girls leave, the new ratio becomes 5 : 3. Find the original number of boys and girls.
1
220 boys and 330 girls
2
300 boys and 220 girls
3
330 boys and 220 girls
4
330 boys and 200 girls
5
300 boys and 200 girls