Question

List all the combinations of 4 objects 1,2,3,and 4 taken 3 at a time.What is C (4, 3)?

Answer 1

Step 1:

The four objects are 1,2, 3 and 4.

Combinations of objects 1, 2, 3 and 4 taken 3 at a time are,

.

Step 2:

The combination is .

Formula for number of combinations of , taken at a time is given by, 

.

Where , and

.

Substitute and in the combination formula.

Solution:

.