The probabilities and the number of automobilies lined up at lakeside Olds dealership at opening time (7:30 a.m.) for se

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The probabilities and the number of automobilies lined up at
lakeside Olds dealership at opening time (7:30 a.m.) for service on
Tuesday's are:
number probability
0 0.025
1 0.125
2 0.35
3 0.40
4 0.10
What is the expected number of automobiles lined up at a
lakeside Olds dealership at opening time on Tuesday.
A) 2.5
B) 2.25
C) 2.78
D) 2.43