The following contingency table provides a joint frequency distribution for a group of retired people by career and age at retirement.
Suppose one of these people is selected at random.Compute the probability that the person selected was an attorney who retired between 61 and 65.
A)0.401
B)0.106
C)0.264
D)0.249
E)0.424

Question

The following contingency table provides a joint frequency distribution for a group of retired people by career and age at retirement. 
Suppose one of these people is selected at random.Compute the probability that the person selected was an attorney who retired between 61 and 65.
A)0.401 
B)0.106 
C)0.264 
D)0.249 
E)0.424

Quizplus · Accepted Answer

To calculate the probability of selecting an attorney who retired between 61 and 65, we need to find the frequency count for that category and divide it by the total number of retirees.

From the table, we can see that there are 95 retirees who are attorneys and retired between 61 and 65. The total number of retirees is 900. So,

P(attorney and retired between 61 and 65) = 95/900 = 0.106

Therefore, the correct answer is B) 0.106.

The Following Contingency Table Provides a Joint Frequency Distribution for a Group