Question

a coin is tossed two times find the probability of getting (1 . exactly one head (2.at least one head (3. at most one head​

Answer 1

$|\Omega|=2^2=4$

1.

$|A|=2\\P(A)=\dfrac{2}{4}=\dfrac{1}{2}$

2.

$|A|=3\\P(A)=\dfrac{3}{4}$

3.

$|A|=3\\P(A)=\dfrac{3}{4}$