Given:
Total number of boyfriends = 72
Number of boyfriends who jump off the window = 9
To find:
The remaining number of boyfriends.
Solution:
We need to subtract the number of boyfriend who jump off the window from the total number of boyfriends to get the remaining number of boyfriends.
![\text{Remaining boyfriends}=72-9](https://img.qammunity.org/2021/formulas/mathematics/high-school/20hq051b43j9w13pf25963q8m5q0z4zs9e.png)
![\text{Remaining boyfriends}=63](https://img.qammunity.org/2021/formulas/mathematics/high-school/54mto1rvg4wiyot18428na8cng8tqb7l2e.png)
Therefore, the number of remining boyfriends is 63.