Question

Two coins are tossed simultaneously. Write the sample space ${}^{\prime }{S}^{\prime }$ and the number of sample point $n\left(S\right)$. $A$ is the event of getting no head. Write the event $A$ in set notation and find $n\left(A\right)$.

Answer 1

Sample space $S=\left\{\right(H,H),(H,T),(T,H),(T,T\left)\right\}$
Number of sample space $n\left(S\right)=4$
$D=$ getting no head
$D=\left\{\right(T,T\left)\right\}$
$n\left(D\right)=1$