SOLUTION: in a random sample of 350 voters,200 are Republicans. If three voters are selected at random from this sample. what is the probability that at least one of the voters is republ

Question 321174: in a random sample of 350 voters,200 are Republicans. If three voters are selected at random from this sample. what is the probability that
at least one of the voters is republican
all three of the voters are republican
none of the voters are republican
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
in a random sample of 350 voters,200 are Republicans. If three voters are selected at random from this sample. what is the probability that
at least one of the voters is republican
= 1 -P(none is a reprublican)
= 1 - 150C3/350C3
= 1 - 0.0778
= 0.9222
----------------------------
all three of the voters are republican
= 200C3/350C3
= 0.1854
--------------------------
none of the voters are republican
= 0.0778
================
Cheers,
Stan H.

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