Question

How many 3-letter combinations can be made from this set if no letter can be repeated?

{a, b, c, d, e, f}
A.100
B.120
C.240
D.30

Answer 1

B 120 different combinations

Explanation:

There are 6 letters to choose from

Picking a letter for the first spot 6

Then there are 5 letters left

Picking a letter for the second spot 5

Then there are 4 letters left

Picking a letter for the second spot 4

6*5*4

= 120