A student has 10 tickets to the show but she has 20 friends whowant to see the show. Find the number of ways she can choose ten togive the tickets to, where:
a. There are no restrictions. Simplify your answer to a finalnumber.
for questions b and c Do not simplify your answers. Leave inCombinatorics format.
b. Two of the friends are twins so if you invite one you have toinvite the other
c. Two of the friends do not like each other so if you inviteone you cannot invite the other.
