When a coin is tossed once, there are two possible outcomes: head (H) and tail (T).
When a coin is tossed four times, the total number of possible outcomes is 24 = 16
Thus, when a coin is tossed four times, the sample space is given by:
S= {HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT, THHH,
THHT, THTH, THTT, TTHH, TTHT, TTTH, TTTT}
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