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We know that, if a coin is tossed for \[n\] times, the number of sample space is \[{2^n}\].

The given experiment is tossing a coin for four times.

There are only two sides of a coin: head and tail.

Here, we denote head as \[H\] and tail as \[T\].

We know that, if a coin is tossed for \[n\] times, the number of sample space is \[{2^n}\].

Here, the coin is tossed for \[4\] times, the number of sample space is \[{2^4} = 16\]

When a coin is tossed for four times, the sample space can be written as:

\[

\{ HHHH,HTHH,THHH,HTHT, \\

HHHT,HTTH,TTHH,THTH, \\

HHTT,HHTH,TTTH,THHT, \\

HTTT,TTTT,TTHT,THTT\} \\

\]

Hence, the sample space for the experiment of tossing a coin four times is \[

\{ HHHH,HTHH,THHH,HTHT, \\

HHHT,HTTH,TTHH,THTH, \\

HHTT,HHTH,TTTH,THHT, \\

HTTT,TTTT,TTHT,THTT\} \\

\]