four different sets of objects contain 3 5 6 and 8 objects, respectively. How many unique combinations can be formed by picking on object from each set?

Question

A.134
B.484
C.720
D.22

Answer 1

The correct answer is C, 720.

 

Here is the reasoning.

 

Pick one object from the first set. There are three possibilities.

Pick a second object from the second set. There are 5 possibilities. So, there are 3 x 5 = 15 possibilities for choosing from the first two sets.

 

Continue in this way. There are a total of 3 x 5 x 6 x 8 = 720 combinations, not counting the order in which they are picked.