we know that
The probability of an event is the ratio of the size of the event space to the size of the sample space.
The size of the sample space is the total number of possible outcomes
The event space is the number of outcomes in the event you are interested in.
so
Let
x---------> size of the event space
y--------> size of the sample space
the probability is equal to
[tex]P=\frac{x}{y}[/tex]
in this problem we have
[tex]y=72,000,000\ people[/tex]
[tex]x=3,600\ people[/tex]
find the percent chance that a person will drown in a given year
substitute the values in the formula of probability
[tex]P=\frac{3,600}{72,000,000}[/tex]
[tex]P=0.00005[/tex]
convert to percentage------> multiply by [tex]100[/tex]
[tex]percentage=0.00005*100=0.005\%[/tex]
therefore
the answer is
[tex]0.005\%[/tex]
