Question

If two unbiased coins are tossed once, what is the probability of getting:
One head

Answer 1

A] $P\left(H\right)=\frac{1}{2}$ $P\left(T\right)=\frac{1}{2}$

P (one head) = P (HT + TH) $=\frac{1}{2}\times \frac{1}{2}+\frac{1}{2}\times \frac{1}{2}$

$=\frac{1}{4}+\frac{1}{4}$

$=\frac{2}{4}=\frac{1}{2}$