Question

Best answer gets a medal!
Find the sample space for tossing 2 coins. Then find P(exactly 1 head).

Answer 1

Sample space means all the possible results of tossing two coins, so one result is 2 heads, and one is the first one is a head and the second is a tail. How many more can you list? How many have exactly one head?

Answer 2

2 heads
1 heads & 1 tails
2 tails
right?

Answer 3

Close, but not quite.

H H
T H
H T
T T

right?

Answer 4

You need to view one head and one tail as a different result from one tail then one head. So your sample space has four different results. Now count how many have just one head and put that over the total number of results to find the Probability of exactly one head.

Answer 5

yea, so is it 1/4 or 1/8?

Answer 6

There were 4 different outcomes, right? H H, T H, H T, and TT. How many of them have exactly 1 H? That number, divided by the total number of outcomes, is the probability of exactly 1 H.