A commitee of 6 is to be selected from 10 people of whom A and B are two. HOw many commitees can be formed excluding A if B is included

i have already solved the first part of this qs which was if A and B were both included and that came out to be 70, using combination formula

i really need help for the second part. the answer is 140 but i dont know how to get there ><""

and can someone help me with second half of question too?

In how many ways can a commitee of 3 men and 4 women be chosen from 6 men and 7 women? What proportion of these committees contain a particular man and 2 particular women?

ive worked out the first part which is 700 but i dont know the second half which is 1/7 T.T

thanks guyz for any help given !