If a fair coin is tossed 3 times, what is the probability of getting at least two heads?

If a fair coin is tossed 3 times, what is the probability of getting at least two heads?
A.23
B.45
C. 25
D. 2

Correct Option: Answer is A
Solution:
The outcomes are {HHH, HHT, HTT, HTH, THH, THT, TTH, TTT}
P(at least two heads) = 4/8 = 1/2

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