How many outcomes can you get when you toss three coins once?

(a)

6

(b)

8

(c)

3

(d)

2

In how many ways can you answer 3 multiple choice questions, with the choices A, B, C and D?

(a)

4

(b)

3

(c)

12

(d)

64

How many 2 digit numbers contain the number 7?

(a)

10

(b)

18

(c)

19

(d)

20