2.5 Coin flips.

If you flip a fair coin 10 times, what is the probability of
  1. Getting all tails?
  Probability of getting a tails on one flip is 1/2
  Probability of getting all tails for 10 flips is 
    (1/2)^10 = 1/1024 = 0.000976
  1. Getting all heads?
  Probability of getting a heads on one flip is 1/2 
  Probability of getting all heads for 10 flips is 
    (1/2)^10 = 1/1024 = 0.000976
  1. Getting at least one tails?
    Probability of getting atleast one tails is 
    1 - P(no tails) = 1 - P(all heads) = 1 - 0.00098 = 0.999