A small grocery store is considering installing an express checkout line. Let X be the number of customers in the regular checkout line. Note that these numbers include the customers being served, if any. The probability distribution of X is given in the table below.
x
0
1
2
3
P(X=x)
0.28
0.22
0.26
0.24
Find the probability that one customer is in the regular checkout line.
What will be an ideal response?
P(X=1)=0.22??
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