Use the fundamental principle of counting. In the first seat, we can choose the seater from the four persons. On the next seat, only 3 people would be available. On the second, there are 2 and finally 1 to the last seat. Multiply all the possible number of seaters, 4 x 3 x 2 x 1 = 16 Thus, the answer is letter C.
The answer for these probability questions is always *How many people* Times(x) *How sides does the shape have* So the Answer to this question would be 16 (4x4) It works in different ways e.g A combo of 5 different shirts and 3 different pants How Many outfits could be made (5x3) = 15