BEST Answer Please Help I have working on this problem for three hours?

An instructor gives an exam with twelve questions. Students are allowed to choose any ten questions to answer/





there are 66 different choices of ten questions








suppose five questions require proof and seven do not.


how many groups of ten questions contain at most three that require proof?BEST Answer Please Help I have working on this problem for three hours?
CHOICE WITH 1 PROOF


0


CHOICE WITH 2 PROOF


0


CHOICE WITH 3 PROOF


5C3+7C7


=10+1


=11


THERE ARE 11 GROUPS SORRY IF IT DOESNT


HELP