Re: If a certain bus line’s ridership in July was 3 5 of its ridership in
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31 Oct 2021, 02:51
Let the ridership in June be 100.
Then the ridership in the month of July would be 3/5 of 100 = 60 &
the ridership for the month of August would be 1/3 of 60 = 20.
Arithmetic mean of ridership for the months of July and August is (60+20)/2 = 40.
The bus line's ridership for June is 2 1/2 times of its ridership in July and August.
So the answer is D