Solve the problem.A woman counts the number of emails she receives every day. Let the random variable X be the number of emails she receives in a day, which is always between 2 and 6. She calculates the probability mass function to be 
for 
Find ? and explain what this number represents.
A. ? = 4.67 is the average number of emails she gets per day
B. ? = 4.67 is the fewest emails she could get in a day
C. ? = 4 is the most emails she could get in a day
D. ? = 2 is the average number of emails she gets per day
Answer: A
Mathematics
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Find the inflection points of the function 
.
?
A. 
B. 
C. 
D. There are no inflection points.
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