mymathlab probability

A legislative committee consists of 8 Democrats and 5 Republicans. A delegation of 4 is to be selected to visit a small island republic. Complete parts (a) through (d) below. (a) How many different delegations are possible? The 4 delegates can be selected T different ways. (b) How many delegations would have all Democrats? The 4 delegates can be selected T | different ways if all 4 are Democrats. (c) How many delegations would have 3 Democrats and 1 Republican? The 4 delegates can be selected |T | different ways if 3 are Democrats and 1 is a Republican. (d) How many delegations would include at least 1 Republican? The 4 delegates can be selected T different ways if at least 1 is a Republican