Answer the question arithmetic/fractions explain

The answer is D. 2 1/3. it is kind of hard to explain but here is how I always do it... I would multiply the 4 by the 5 and get 20. then add the 1 to the 20 to get 21/4. then I would put it in my calculator... I have a scientific calculator that I put the numbers in fraction form and the calculator will give the answer in fraction form. and I think it will even give you the mixed number fraction but I'm not entirely sure. I did not use my scientific calculator to answer this problem

80 Trains

Step-by-step explanation:

Number of Trains Late = 3

Number of Trains on Time = 16

Total Number of Trains = 16+3=19

Relative Frequency = Number of Success/Number of Experimental Trials

Relative Frequency of a Train being on Time

In experimental probability, we can use the relative frequency of an event in the experiment to predict for an increased number of trials.

Expected Number of Outcome = Relative Frequency of the Event X Total Number of Trials

In this case, the Total Number of Trials = 95

Number of Trains expected to be early