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20 August, 07:13

A recent survey shows that the probability of a college student drinking alcohol is 0.6. further, given that the student is over 21 years old, the probability of drinking alcohol is 0.8. it is also known that 30% of the college students are over 21 years old. what is the probability of drinking alcohol and being over 21 years old? 0.66 0.36 0.24 0.42

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  1. 20 August, 09:00
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    30% can be expressed as 0.3

    The probability that a random college student over 21 happens to drink alcohol can be calculated as: 0.3 x 0.8 which is equal to 0.24.
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