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KristabelKrysta
You toss 3 coins. Find P(at least 1 tail is tossed).
There will be 8 out comes Possibilities: HHH, HHT, HTH, THH, HTT, THT, TTH, TTT.
P(atleast 1)=1- P(none)....so 1-P(all heads tossed)....so 1-0.5*0.5*0.5
so the prob of getting atleast 1 head = 7/8
HHH HHT HHH HHT TTH TTT TTH TTT