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Number of possible outcomes with 4 coins = 2 x 2 x 2 x 2 = 16.Number of successes = 2. (Three heads or four heads)Probaility of success = 2/16 = 1/8 = 12.5 percent
Heads and HeadsHeads and Tails Tails and HeadsTails and Tails
There is 6 possible outcomes per roll of a die. So, there are 6*6*6*6 outcomes or 64 or 1296 possible outcomes.
There are four outcomes possible (not considering order)HHHHHTHTTTTTOnly in two of the cases are there two or more headsThe probability is 0.5
If H = heads and T = Tails, and if the four sided die has values A and B, the 8 possible outcomes are: HA, HB, HC, HD, TA, TB, TC and TD.