3 years ago

A fair coin is tossed three times. What is the probability of getting at least two heads?

1 answer:

6 0

The answer is 50%

if you list out the possibilities, you get

(H being heads, T being tails)

HHH <- 3 heads
HHT <- 2 heads
HTH <- 2 heads
HTT
THH <- 2 heads
THT
TTH
TTT

we counted 4 of them to have at least 2 heads out of the 8 possibilities

4/8 = 1/2 which is 50%

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