Team of four students is to be selected from a total of 12 students for a quiz competition. In how many ways it can be selected if two particular students should be included and two particular students don't want to be in the team.
28
Let particular four students are A, B, C and D out of 12.
A and B are selected and C and D are not selected.
Select reaming 2 from reaming 12-4 = 8
Number of ways = 8C2= 28