Question

Consider the experiment of tossing two fair coins simultaneously, Find the probability that both are head or at atleast one of them is head.

Answer 1

Solution:

When two different coins are tossed randomly, the sample space is given by

$S=HH,HT,TH,TT$

Therefore, $n\left(S\right)=4$.

Let E be the event that both are head or atleast one of them is head.

$n\left(E\right)=3$ and $n\left(S\right)=4$, then $p\left(E\right)=\frac{n\left(E\right)}{n\left(s\right)}$

$=\frac{3}{4}$