A fair coin

A fair coin is tossed twice. Write down the set of possible outcomes.
What is the probability of obtaining?
I. Exactly one head
ii. No head

Correct answer:

p1 =  0.5
p2 =  0.25

Step-by-step explanation:

HH HT TH TT  p1=42=21=0.5
p2=41=0.25



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