The lottery consists of picking three different numbers from 1-12. 12 numbered ping pong balls are put into a fishbowl, and three are selected. Order does not matter.
a) How many possible poutcomes are there for this lottery?

Question

The lottery consists of picking three different numbers from 1-12. 12 numbered ping pong balls are put into a fishbowl, and three are selected. Order does not matter. 
a) How many possible poutcomes are there for this lottery?

anonymous · Answer

is it 12!/3!?

anonymous · Answer

b) suppose you bet on 2, 9, and 11. ? is the probability that you win the lottery? Give your answer as a decimal.
c) ? is the probability that at least one of your numbers matches one of the numbers drawn? give answer as decimal.

zarkon · Answer

that is not correct

anonymous · Answer

12c3?

anonymous · Answer

11c3 as 12 numbered ping pong balls are put into a fishbowl

zarkon · Answer

12C3 is correct

anonymous · Answer

@tarekkowshik why 11c3?

anonymous · Answer

b) suppose you bet on 2, 9, and 11. ? is the probability that you win the lottery? Give your answer as a decimal.
c) ? is the probability that at least one of your numbers matches one of the numbers drawn? give answer as decimal.

anonymous · Answer

Your are taking 3 balls from 11 balls(12 numbered ping pong balls are put into a fishbowl). And so according to combination it is 11c3=165.It means there are 165 possible outcomes.

anonymous · Answer

@tarekkowshik what did you get for b) suppose you bet on 2, 9, and 11. ? is the probability that you win the lottery? Give your answer as a decimal.
c) ? is the probability that at least one of your numbers matches one of the numbers drawn? give answer as decimal.