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Question
In two toss of a coin, the probability of getting at least one head is ______.
Options
`3/4`
`1/2`
`1/4`
1
MCQ
Fill in the Blanks
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Solution
In two toss of a coin, the probability of getting at least one head is `underlinebb(3/4)`.
Explanation:
The sample space for two tosses is {HH, HT, TH, TT} 4 equally likely outcomes.
The outcomes with at least one head are HH, HT, TH, 3 favourable outcomes, so probability = `3/4`.
Alternatively, P(at least one head)
= 1 – P(no heads)
= 1 – P(TT)
= `1 - 1/4`
= `3/4`
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