uestions 2, 3 and 4 relate to the following information.

The administrative employees of Wyer Co Pty Ltd, can be classified according to the following table:

Salary Level p.a.

Branch

$20,000 - $30,000

$30,001 - $40,000

Albury

3,000

200

Bathurst

1,000

1,600

Wagga

900

2,100

2 The probability that an employee, selected at random, works at the Wagga branch is approximately:

A. 0.71

B. 0.54

C. 0.34

D. 0.18

3 The joint probability that an employee, selected at random, earns $30,001 - $40,000 and works at the Albury branch is approximately:

A. 0.80

B. 0.16

C. 0.05

D. none of the above.

4 The probability that an employee, selected at random, earns between $20,000 and $30,000, given that they work at the Wagga branch, would be an example of a:

A. marginal probability

B. probability that must be calculated in accordance with addition theorem

C. conditional probability

D. joint probability