If A = { 1, 2, 3, 4 } B = { 3, 4, 5 } C = { 5, 7, 8, 9 }

then A B - C equals

		{ 3, 4, 5 }
		{ 3, 4 }
		{ 1, 2, 3, 4 }
		None of the above

A newly formed group has ten members.

In how many ways can the group elect a committee of 4 members ?

		10P4
		10C4
		210
		24

Let A = { a, b, c }

How many tuples are in the Cartesian product A x A ?

2⁶

9

6

2³

If A = { 2, 3, 4 } how many sets are in the power set of A

		6
		23
		32
		9