Question

Two coin are thrown once what is probability of getting aleast one head

Answer 1

Step-by-step explanation:

Two coins are tossed. The sample set S will be {HH,HT,TH,TT}

(i) Let A be the event of getting two heads. Then event A will contain the outcome {HH}

P(A)=n(S)n(A)=41

(ii) Let B be the event of getting at least 1 tail. Then, B will contain the outcomes {HT,TH,TT}

P(B)=n(S)n(B)=43

Answer 2

Total number of observations= 4

1. Head-Tail
2. Head-Head
3. Tail-Head
4. Tail-Tail

No. of observations with one Head= 2

Probability = 2/4

= 1/2 or 50%