1.The following contingency table shows the results of a random survey of age (years) and attitude to the proposed law to make voting in Australia voluntary:

	Agree	Disagree	Undecided
Under 25	11	70	44
25 to 50	50	66	29
Over 50	21	31	47

What is the probability that one randomly selected person from this sample disagrees or is under 25 years old?

Please provide your answer in decimal form or percentage form, correctly rounded to two decimal places.

If using percentage form, please do NOT include the % symbol.

2.You are told that P(A) = 0.5, P(B) = 0.4 and P(A or B) = 0.68

What is the value of P(A and B)?

Please provide your answer in decimal form or percentage form, correctly rounded to two decimal places.

3.You are told that P(A) = 0.4, P(B) = 0.4 and P(A and B) = 0.2

What is the probability of A given B?

Please provide your answer in decimal form or percentage form, correctly rounded to two decimal places.

If using percentage form, please do NOT include the % symbol.

4. A researcher wants to examine the relationship between opinion of a proposed new gas mine and the political party followed. The observed frequencies are summarized in the following table

	Opinion
For	Against	Undecided
Political party followed	Greens	27	13	8
Labor	15	22	14
Liberal	16	16	4

What is the total number of respondents in this survey?