3 coins tossed at a time what is the probablity of getting at most 2 heads

• atmost 2 heads means we can have every combination except HHH
  so the answer will be atmost 2 head=7/8.
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• favorable outcome=1- non favorable
  here only HHH is non favorable
  total outcomes= 2^3
  ans = 1-1/8= 7/8
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• chance of getting at most 2 heads is(HHT,HTH, HTT, TTT, THH,THT,TTH,)
  SO PROBABILITY IS 7/6^3
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• probability would be 3/8
  
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• total outcome=8 {HHH,HHT,HTH,HTT,TTT,TTH,THT,THH}
  ans favorable outcome={oucome in which no head of more than two head comes}
  so the answer is =6/8
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• P(of getting at most two heads)=¾
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