7.A group has 9 women and 7 men.
d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen
8. In how many ways can 16 people be seated:
a. In a row, if 4 of the 16 do not want to sit next to one another
b. In a row, if 3 of the 16 must be seated next to one another
c. In a circle, if 3 of the 16 must be seated next to one another.
d. In a circle, if 4 of the 16 do not want to sit next to one another.
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