ok if i find the sample space for tossing 2 coins . Then find P(exactly 1 head). How do i do that?

Question

phi · Answer

what did you get for the sample space?

anonymous · Answer

1/2

phi · Answer

that is a probability
the sample space is 
HH,  HT,  TH, TT
out of the 4 possible outcomes, 2 have exactly 1 head,  so 2/4 or 1/2 is the probability of exactly 1 head.

anonymous · Answer

thanks for the help so 1/2 would be ok

phi · Answer

Yes.  You write down all the way something might happen and then count the number that match what you are looking for.

anonymous · Answer

how would i use the counting principle to find the probability?

phi · Answer

How many of the events in the sample space that match the condition divided by the total number of possible events.

anonymous · Answer

ok so if i am choosing the 8 winning lottery numbers when the numbers are chosen at random from 0 to9 how would i set that up