More statistics.
Binomial Probability
\[P(r)=\frac{n!}{r!(n-r)!}p^rq^{n-r}=C_{n,r}p^rq^{n-r}\]
The problem states 10% of adults deliberately do a one time fling (purchase clothing, wear 'em to an event, and return 'em).
In a group of 7 adults what is the probability that anyone has done a one time fling?
I figured that:
n=7
r=0
I plugged those into the equation:
\[P(0)=\frac{7!}{0!(7-0)!}p^0q^{7-0}=C_{7,0}p^0q^{7-0}\]
What about p and q?
The probability of success (p) is 0.1 (1% of people do one time flings)?
and q would be 0.9? Would that be right?

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@hartnn

@mathslover ?

are u sure about n=7, r= 0 ?

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