Question

A coin is tossed 3 times. List the possible outcomes. Find the probability of getting at least 2 heads

Answer 1

The possible outcomes if a coin is tossed 3 times is

S = {(HHH), (TTT), (HTT), (THT), (TEH), (THH), (HTH), (HHT)}

Let E₂ = Event of getting atleast 2 heads = {(HHT), (HTH), (THH), (HHH)}

∴ n(E₂) = 4

∴ `P(E_2) = (n(E_2))/(n(S)) = 4/8 = 1/2`