Question

Question 4
Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:
$\begin{array}{ccccc}\text{Out come}& \text{3 heads}& \text{2 heads}& \text{1 head}& \text{No head}\\ \text{Frequency}& 23& 72& 77& 28\end{array}$
If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.

Answer 1

Number of times 2 heads come up =72
Total number of times the coins were tossed=200
$\text{P (2 heads will come up)}=\frac{\text{Number of times 2 heads come up}}{\text{Total number of times the coins were tossed}}$
$\text{P (2 heads will come up)}=\frac{72}{200}=\frac{9}{25}$