The number of phone calls coming into a switchboard in the next five minutes will either be 0,1,or 2.The probabilities are the same for each of these (1/3).If X is the number of calls arriving in a five-minute time period,what is the mean of X?
A)1/3
B)2/3
C)1
D)4/3
E)None of the above

Question

Quizplus · Accepted Answer

The mean of X can be calculated as:
(0*1/3) + (1*1/3) + (2*1/3) = 4/3
Therefore, the mean of X is 4/3 or 1.

The Number of Phone Calls Coming into a Switchboard in the Next