Advanced Math
posted by Patrick on .
The probability of getting 2 heads and 1 tail when three coins are tossed is 3 in 8. Find the odds of not getting 2 heads and 1 tail.
ANSWER: 5:8?
Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.?
ANSWERS: Could it be 1/4?

The first answer is correct.
For the second, once you have the first head there are four possibilities for the other two coins:
HH
TT
TH
HT
They must show one head for there to be two heads. What proportion do you find?
I hope this helps. Thanks for asking. 
5:8