Three unbiased coins are tossed together. Find the probability of getting

Three unbiased coins are tossed together. Find the probability of getting

  1. Two heads.
  2. At least two heads.
  3. No heads

When 3 unbiased coins are tossed, the sample space is {HHH, HTH, HHT, THH, THT, TTH, HTT, TTT] = 8

Event of getting two heads = {HTH, HHT, THH} = 3
P(Two Heads) = 3/8

Event of getting At least two heads (two or more than 2 heads) = {HHH, HTH, HHT, THH} = 4

P(At least Two Heads) = 4/8 = 1/2

Event of getting No heads = {TTT} = 1

P(No Heads) = 1/8