ACET (Actuarial Common Entrance Test) Statistics: Questions 146  150 of 201
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Question number: 146
» Discrete Random Variables » Probabilities
Question
Let X be a discrete random variable with the following PMF
Find
Choices
Choice (4)  Response  

a.  0.5  
b.  0.1  
c.  0.2  
d.  0.4 
Question number: 147
» Probabilities » Bayes Theorem
Question
A doctor is to visit a patient. From the past experience, it is known that the probabilities that he will come by train, bus, scooter or by other means of transport are respectively The probabilities that he will be late are if he comes by train, bus and scooter respectively, but if he comes by other means of transport, then he will not be late. When he arrives, he is late. What is the probability that he comes by train?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 148
» Discrete Random Variables » Mean, Mode, Median
Question
A spinner is divided into five equal sections numbered 1 to 5. The arrow is equally likely to land on any section. Calculated the mean of the probability experiment.
Choices
Choice (4)  Response  

a. 
 
b.  3  
c.  15  
d. 

Question number: 149
Question
The number of permutations that can be made out of the letters of the word “ENTRANCE” so that the two Ns are always together?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 150
» Continuous Distributions » Exponential
Question
The length of telephone conversation in a booth has been on exponential distribution & found on an average to be 5 minutes. Find the probability that a random call made from this ends less than five minutes.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
