Two out of ten tickets on sale for a raffle draw are winning tickets. If a guest bought two tickets, what is the probability that both tickets are winning tickets?
-
A.
(frac{1}{80}) -
B.
(frac{1}{45}) -
C.
(frac{1}{20}) -
D.
(frac{1}{10})
Correct Answer: Option B
Explanation
P(winning) = (frac{2}{10})
P(both tickets winning) = (frac{2}{10} times frac{1}{9} = frac{1}{45})