Question

Three coins are tossed simultaneously. What is the probability of getting No heads

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Answer 1

Answer:

Now, favourable outcomes of getting at least one head are {HHH, HHT, HTT, THT, THH, TTH, HTH}. So, the total no. of favourable outcomes is 7.

Answer 2

Answer:

Hyyyy

Step-by-step explanation:

Let H denote heads and T denote tails.

Let H denote heads and T denote tails.Here,the sample space is {HHH,HHT,HTH,HTT,THH,THT,TTH,TTT}.

Let H denote heads and T denote tails.Here,the sample space is {HHH,HHT,HTH,HTT,THH,THT,TTH,TTT}.Hence,on throwing 3 unbiased coins simultaneously,we have 8 possible outcomes,as listed above,and there is only one outcome that has no heads i.e. {TTT}.

Hence,by the classical definition of probability, probability that on tossing three coins we get no heads is=total number of favourable outcomes(here,no heads)/total number of possible outcomes=1/8.

Hope it helps!