Question

In two toss of a coin, the probability of getting at least one head is ______.

विकल्प

• `3/4`

• `1/2`

• `1/4`

• 1

Answer 1

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`