Question

A total of 6 family members will appear in a portrait. If 4 of the family members may sit in the front row, how many combinations of family members may sit in the front row? A.24 B.12 C.18 D.15

Answer 1

The order of the persons seated in front is not important so long as there are four of them. The combination of the given problem is expressed as,
                                     6C4
The numerical value of the combination is 15. Thus, the answer to this item is letter D.