The following contingency table gives the results of a sample survey of South African male and female respondents, with regard to their preferred cell phone service provider: PREFERRED PROVIDER Vodacom MTN Cell C Total No. of Males 150 75 25 250 No. of Females 100 100 50 250 TOTAL 250 175 75 500 Q.3.1 What is the probability of randomly selecting a male respondent from the sample? Q.3.2 What is the probability of randomly selecting a respondent who is female and prefers Cell C? Q.3.3 What is the probability of selecting a male respondent, given that the preferred provider is Vodacom?
The following
PREFERRED PROVIDER
Vodacom MTN Cell C Total
No. of Males 150 75 25 250
No. of Females 100 100 50 250
TOTAL 250 175 75 500
Q.3.1 What is the
sample?
Q.3.2 What is the probability of randomly selecting a respondent who is female and
prefers Cell C?
Q.3.3 What is the probability of selecting a male respondent, given that the preferred
provider is Vodacom?
Q.3.4 What is the probability of selecting a respondent who is male or who prefers
Vodacom?
Q.3.5 What is the probability of selecting a respondent who does not prefer Cell C?
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