SOLUTION: What is the probability of obtaining exactly four heads in five flips of a coin, given that at least three are heads? (Enter the probability as a fraction.)

Algebra ->  Probability-and-statistics -> SOLUTION: What is the probability of obtaining exactly four heads in five flips of a coin, given that at least three are heads? (Enter the probability as a fraction.)      Log On


   

Question 852894: What is the probability of obtaining exactly four heads in five flips of a coin, given that at least three are heads? (Enter the probability as a fraction.)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Independent Events

five flips 

P(x = 4Hs|3Hs) Note: last two flips can be HH, HT,TH, TT

P(x = 4Hs|3Hs)= 2/4 = 1/2