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
Correct Answer: 0.75
Explanation
S=HH, HT, TH, TT
We can get the result by subtracting the probability of getting no heads with 1.
That is, the probability of getting at least one head = 1 minus the probability of getting no heads:
P=1−1/4
= 3/4
= 0.75
S=HH, HT, TH, TT
We can get the result by subtracting the probability of getting no heads with 1.
That is, the probability of getting at least one head = 1 minus the probability of getting no heads:
P=1−1/4
= 3/4
= 0.75
