If a fair coin is tossed twice, what is the probability of obtaining at least one head?
a
0.25
b
0.75
c
0.5
d
0.33
Explanation
Correct Option
bVideo Explanation
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TheGuru
3 years ago
When a coin is tossed twice, the sample space is given by S ={HH HT TH TT} and the event of occurrence of obtaining at least an head is given by A ={HH HT TH}.
Therefore the probability of getting at least an head is given by:
P = n(A) ÷ n(S)
P = 3 ÷ 4
P = 0·75
