Two coins

Two coins are tossed simultaneously. What is the probability of getting
(i) At least one head?
(ii) At most one tail?
(iii) A head and a tail?

Correct answer:

p1 =  0.75
p2 =  0.75
p3 =  0.5

Step-by-step explanation:

p0=21=0.5 HH, HT, TT, TH  OK: HH, HT, TH  p1=41+1+1=43=0.75
HH, HT, TH  p2=43=0.75
HT, TH  p3=42=21=0.5

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