Question: Hi, Could you please help me with this Probability Question: According to a December 2007 Gallup poll, 24% of American adults have visited a casino

Hi,

Could you please help me with this Probability Question:

According to a December 2007 Gallup poll, 24% of American adults have visited a casino in the past 12 months.

a. What is the probability that of 4 randomly selected adult Americans, all 4 have visited a casino in past 12 months? 0.0033

b. What is the probability that of 4 randomly selected adult Americans, none have visited a casino in the past 12 months? 0.3336

I have the answers but I don't know how to work the answers?

Thanks, Dennis

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