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statistics shows that 40% of South African adults drink coffee, if 6 SA adults are randomly...

statistics shows that 40% of South African adults drink coffee, if 6 SA adults are randomly selected, what is the probability that 4 drinks coffee?

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Answer #1

Let p be the probability that a randomly selected South African drinks coffee .

Then p= 0.40 .

Let X be the number of SA people out of 6 randopmly selcted , who drinks coffee.

Then X~ Bin( 6 , p=0.40)

and ; x=0,1,2,...,6

SO,

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