Cost for 4 persons in Janelle's family = 4 x $75 = $300
Therefore, the total cost of each train trip = $300
Explanation:
From the above working, we will discover that the cost for each person's train trip is $75. Therefore, if 4 people in the family will be making the same train trip at the same cost, the total number of people will be multiplied by the cost per person.
Alternatively, it can be obtained by adding $75 in four places. i.e:
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