Question

The students in an environmental science class will be randomly assigned a storm to research, with no two students researching the same storm. Given that the students will each be assigned a hurricane or a major hurricane for their reports, what is the probability that a student will be assigned a storm that occurred prior to $2000$?

	Tropical Storms	Hurricanes	Major Hurricanes (cat. $3+$)	Total
$1990-1994$	$16$	$23$	$5$	$44$
$1995-1999$	$5$	$41$	$20$	$66$
$2000-2004$	$18$	$37$	$18$	$73$
$2005-2009$	$23$	$37$	$18$	$78$
Total	$91$	$175$	$74$	$340$

• A. $0.2618$
• B. $0.3574$
• C. $0.6426$
• D. $0.7324$

Answer 1

The correct option is B $0.3574$

Given that the students are assigned hurricane or a major hurricane for their reports.

Total number of hurricane and major hurricane storms are $175+74=249$

Total number of above mentioned storms that occurred prior to $2000$ are $23+5+41+20=89$

Thus, the probability is $\frac{89}{249}=0.3574$

Hence, option $B$ is correct.