An unfair coin with Pr[H]=23 is flipped. What is the probability of a tail?

## probability

Tutors, please sign in to answer this question.

# 2 Answers

Do you mean p = .23 for heads and if so then tails will come up at p = .77

Perhaps I do not understand your wording.

Hi Heather,

The probability of all possible outcomes must always sum to 1.

I think in your question the pr(H)= 2/3 (since it cannot be greater than 1 it cannot be 23) which would mean the probability of a tail is 1 - pr(H)= 1-(2/3) = 1/3

Hope this helps!