The first three cars are numbered; 9.9, 14.7, 19.5, and Option B.
Generally, the first three cars are numbered with non-integers mathematically given as
Where
The first car numbered 9.9.
and
The second car numbered is
x=9.9+4.8
x=14.7
The third car numbered is
x'=14.7+4.8
x=19.5
In conclusion, option B is the correct answer.
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