Question 376298
There are {{{2^3=8}}}
 possible outcomes.
{{{HHH=3 H}}}

{{{HHT=2 H}}}

{{{HTH=2 H}}}

{{{HTT=1 H}}}

{{{THH=2 H}}}

{{{THT=1 H}}}

{{{TTH=1 H}}}

{{{TTT=0 H}}}

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.
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Zero Heads: {{{ P(0)=1/8}}}
One Head:{{{ P(1)=3/8}}}

Two Heads:{{{P(2)=3/8}}}

Three Heads: {{{P(3)=1/8}}}