Ben spins a biased coin twice. The probability that it will come down heads both times is 0.36
What is the probability that it will come down tails both time?
Is it 1 - 0.36 = 0.64
Let $\displaystyle $$p$ be the probability that the coin comes down heads on a single flip. Then the probability that it comes down heads on two consecutive flips is:
$\displaystyle p^2=0.36$
The probability that it comes down tails on two consecutive flips is: $\displaystyle (1-p)^2$.....
and the rest is algebra
CB