A pair of coin is tossed find the probability of getting one heard or one tail
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Step-by-step explanation:
Since both coins have a 50% chance of landing on heads or tails, there's 5 possibilities: HHHH, HTHH, HHTT, TTTT, HTTT; Which means 1, 1, 1, 0, 1. This would equal 4/5 of one head atleast showing. An 80% chance. Same would apply to tails atleast once.
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