Two coins are tossed. How many outcomes does the event 'at least one head' contain?

1

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2

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3

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4

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CorrectNot quiteAnswer C

Correct answer: C

The sample space is $\{HH, HT, TH, TT\}$ .
At least one head: $HH$ , $HT$ and $TH$ , 3 outcomes. It has more than one outcome, so it is a compound event.

Worth noting

2 counts 'one head' and 'two heads' as two outcomes, but one head happens in two ways, $HT$ and $TH$ .

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Explanation