<PRE><B>Question 385490</B>
Consider the following contingency table of travelers on a cruise ship and their ages:
 
 
Age		1st cruise		2nd cruise		3rd cruise 		 
21 - 30		25			17			33			 
31 - 40		12			23			10			 
41 – 50		35			15			45			 
Total		72			55			88			

A.    If a person is selected at random, what is the probability it is his/her 2nd cruise? (total of 2nd cruise column)/(grand total)
 
B.     If a person is selected at random, what is the probability the person is either in the age group 31-40 or 41-50? (sum of those rows)/grand total)
 
C.     If a person is selected at random, what is the probability the person is either 21-30 or on his/her 2nd cruise? (sum of 21-30 and 2nd - intersection
of that row and column)/grand total
 
D.    If two people are selected at random, what is the probability they are both on their 1st cruise? 144C2/grandtotalC2
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Cheers,
Stan H.

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