Blood Type Question

[trackgirl000]

Approximately 40% of the California popuation has type O blood. If 4 persons are selected at random to be donors, find P[at least one type O].

 

[galactus]

The opposite of 'at least one' is none. Find the probability of none and subtract from 1


\(\displaystyle \L\\1-C(4,0)(0.40)^{0}(0.60)^{4}\)