Fill from master combo box

Hello dear friends..
I am an infant to Access Data Base. I am developing a simple database for my school. The db has a table called 'Students' and it has a field called 'Paid Fees?'. I brought the table into a continous form. The 'Paid Fees?' field has two probable responses, Yes or No. A combo box control source is linked to it. I have a Master combo box called 'mastercbo' on the header of the continous form. My requirement is that when i select 'Yes' in mastercbo the same response should be recorded to combos in all rows of the form

Thank in advance.

my email : alrahiman@gmail.com